Tutorials
There us a lot of great sources for tutorials. Lynda.com charges a membership fee and gives you 24/7 access to their training videos online. They also have tutorials on apps for the iPhone and iPad. Not all subjects are covered. Their focus is less on basic and more advanced. What they offer is generally top notch.
Apple Support now has a YouTube channel. There are explanatory and how-to videos about the Mac, iPhone, iPad, and Apple Watch. While you are there you can subscribe to the support channel. There is also a more general Apple YouTube channel which is more fun/informational than educational.
There are many other websites that offer a combination of free and paid tutorials. Some sell CDs or offer downloads, which can be quite expensive. Others offer tutorials where only some of the course material is free. Here are a few places to try:
University of Texas at Austin
Introduction to Macs for PC Users helps computer users with no Mac-based experience can get help using Apple computers and their standard software applications. They also become familiar with external storage devices and learn Mac keyboard shortcuts. Course materials include text-based lessons and screen shots, as well as video content. Students can access individual lessons or view or download the entire tutorial. (free online)
Utah State University
These OCW course materials are intended to familiarize novice users with Apple's Macintosh computer. Computer Applications for Instruction and Training allows access to lecture outlines, assignments and video tutorials that cover Microsoft PowerPoint, Adobe Photoshop, Adobe GoLive and Apple's iMovie. Obtaining the necessary hardware, software and peripherals, such as digital video cameras or compatible computers, is the responsibility of the student. Course materials also include links to related resources for independent learning. (free online)
GFCLearnFree.com (free)
vecpix.com (free)
Video-Tutes.com (free)
drycreekphoto.com (free) Resources for Photographers
oreilly.com (subscription-based)
safaribooksonline.com (books and courses)
Remember that YouTube is also a great resource for tutorials on almost anything, and not just from the official Apple YouTube channel.
macrumors.com is another great source of tutorials. However, their tutorials can be hard to locate, as they produce them individually with all their other stories of a particular day. The following is a list of links to some useful ones:
Beginner Tips for Mac Users
How to Take a Screenshot on Your Mac
How to View Folder Sizes on Your Mac Using Finder
How to Add, Remove, and Rearrange Menu Bar Icons in macOS Mojave
How to Customize File and Folder Icons on Your Mac
How to Manage File Associations in macOS
How to Change a File Type's Default App in macOS
How to Use the macOS App Switcher to Open Files, Hide and Quit Apps, and Launch Exposé
How to Enable Markup Annotation Tools in macOS
How to Use Tags to Organize Files and Folders in macOS
How to Add a Recent or Favorite Items Stack to Your Mac's Dock
How to Get Your Mac's Dock to Show Running Apps Only
How to Group Mac App Icons More Prominently in Your Dock
macOS Features
How to Add a Recent Items Folder to Your Mac's Dock
How to Disable Transparency Effects in macOS Mojave
How to Use macOS Mojave's Dynamic Desktop Feature
How to Use Finder Quick Actions in macOS Mojave
How to Use Quick Look in macOS Mojave
How to Organize Your Mac's Desktop With Stacks in macOS Mojave
How to Enable Dark Mode in macOS Mojave
How to Use the macOS Help Menu
Mac Security Tips
How to Use Secure Code AutoFill in iOS 12 and macOS Mojave
How to Set a Custom Lock Screen Message on Your Mac in Case It's Lost
How to Back Up Your Mac Using Time Machine
How to Request a Copy of Your Apple ID Account Data
How to Recover Files, Contacts, Bookmarks, Calendars and Reminders in iCloud
Mac App Features
How to Get the Most Out of Apple's macOS Preview App
How to Batch Convert Images Using macOS Preview
How to Use the Preview Loupe Tool in macOS
How to View All Events as a List in Your Mac's Calendar App
How to Quickly Resize Images on Your Mac Using an Automator Service
How to Float Notes Over Application Windows in macOS
How to Make Web Pages in Safari for Mac Easier to Read
How to Control the Behavior of Screenshot Shortcuts in macOS
How to Convert Several Images into a Single PDF Using Preview
How to Set Up Out-of-Office Replies in Apple Mail and iCloud Mail
iCloud
How to Merge and Remove Duplicate Contacts in macOS and iCloud
How to Share Files Stored in Your iCloud Drive
How to Recover Files, Contacts, Bookmarks, Calendars and Reminders in iCloud
How to Use iCloud Keychain on Your iOS Devices
Continuity and Other Product Tips
How to Use Your iPad as a Second Screen for Your Mac
How to Use the New Continuity Camera Feature in macOS Mojave
How to Send and Receive SMS Messages on iPad and Mac via Text Message Forwarding
How to Grab Screenshots and Video From Apple TV Using Your Mac
How to AirPlay Audio From Your Mac to HomePod
How to Unlock Your Mac With Your Apple Watch
Hidden Tricks
How to Use Text Clippings in macOS
How to Electronically Sign a PDF Using Preview on Mac
How to Hide and Remove System Preference Panes in macOS
How to Snap Back to Your Search Results When Browsing in a Safari Tab
Advanced Features
How to Pair an Apple Remote With an Apple TV or Mac
How to Get Unique Alerts for VIP Emails Received on Your Mac
How to Use Your Mac's Media Keys to Adjust Speaker Volume on a DisplayPort, HDMI, or Thunderbolt Monitor
How to Rebuild the Spotlight Index on Your Mac
How to Perform a Clean Installation of macOS 10.14 Mojave
How to Output Your Mac's Audio to Two Pairs of Headphones at the Same Time
How to Add an AirDrop Shortcut to Your Mac's Dock
How to Tame macOS Hot Corners Using Modifier Keys
How to Set Up a System-Wide Word Count Service on Your Mac
How to Create File Templates on Your Mac With Finder's Stationery Pad Feature
How to Reset Your Mac's Bluetooth Module to Fix Connection Issues
How Tos for iPhone Users
How to Set Up Your New iPhone Using Automatic Setup
How to Force Restart iPhone X, iPhone XS, iPhone XS Max, and iPhone XR
How to Force Restart or Hard Reset the iPhone 8 and iPhone 8 Plus
How to Force Restart iPhone 7 and iPhone 7 Plus
How to Close Apps on iPhone X, XR, XS, and XS Max in iOS 12
How to View the Desktop Version of a Website on Your iPhone
How to Identify and Remove Unnecessary Apps on Your iPhone
How to Set Up Medical ID on Your iPhone
How to Control and Tweak a True Tone Display on iPhone
How to Use Apple Pay Cash on iPhone
How to Use Do Not Disturb While Driving
How to Save Space Using Built-In iOS Storage Features
How to Make a Group FaceTime Call on iOS 12
How to Use Drag and Drop on an iPhone
How to Capture Better Videos With Your iPhone
7 Useful iPhone Tips You Might Not Know
How Tos for iPad Users
How to Set Up Your New iPad Using Automatic Setup
How to Shut Down or Force Restart Your 2018 iPad Pro
How to Take a Screenshot on the 2018 11 and 12.9-Inch iPad Pro Models
How to Use Apple Pay Cash on iPad
How to Identify and Remove Unnecessary Apps on Your iPad
How to View the Desktop Version of a Website on Your iPad
How to Control and Tweak a True Tone Display on iPad
How to Access Control Center and Home Screen in iOS 12 With the iPad's New Gestures
How to Send and Receive SMS Messages on iPad via Text Message Forwarding
How to use the iPad App Switcher
How to Use Drag and Drop on an iPad
How Tos in iOS 12
How to Use App Limits and Downtime in iOS 12
How to Access and Set Up Parental Controls in iOS 12
How to Turn on Automatic Software Updates in iOS 12
How to Create and Use Memoji in iOS 12
How to Use Screen Time in iOS 12
How to Use iOS 12's New Do Not Disturb Options
How to Access and Set Up Parental Controls in iOS 12
All of the Changes to Notifications in iOS 12
Useful iOS Features
How to Use the Magnifier Feature on iPhone and iPad
How to Take Burst Photos on iPhone and iPad
How to Share Your Wi-Fi Password With a Friend on iPhone or iPad
How to Subscribe to Calendars on iPhone and iPad
How to Control and Tweak a True Tone Display on iPhone and iPad
How to Use Apple Pay Cash on iPhone and iPad
How to Use the iPad's Nifty Flick Keyboard Feature
How to Record Your iPhone or iPad Screen
How to Use App Limits and Downtime in iOS 12
Hidden iOS Tricks
How to Change Siri's Voice on iPhone or iPad
How to Drag and Drop Text Between Apps on the iPad
How to Close All of Your Safari Tabs at Once on iPhone or iPad
How to Scan a QR Code Using the Camera on the iPhone or the iPad
How to Perform a Quick Website Search in Safari
How to Get Siri to Play a Daily News Digest
How to Get the Most Out of Your Sixth-Generation iPad
Important iOS Security Tips
How to Secure Your Apple ID Using Two-Factor Authentication
How to Create a More Secure Passcode on Your iPhone or iPad
How to Use Automatic Strong Passwords and Password Auditing in iOS 12
How to Use Safari's Private Browsing Mode and Delete Your Browsing History
Advanced iOS Functionality
How to Let a Contact Bypass iOS 12's Do Not Disturb Mode Without Adding Them to Your Favorites List
How to Enable and Disable Critical Alerts in iOS 12
How to Hide Pictures From the Photos App in iOS 12
The Apple Pencil
How to Change the Tap Gesture on the Apple Pencil 2
How to Use Instant Notes on iPad With Apple Pencil