1. Apple's MacBook Air Site full of information on features, specs and more
2. MacBook Air Support Site contains lots of sections on "how to"
3. Everything you wanted to know about iCloud
4. What is OSX??
5. Explore your Apps
6. Apple in Education

Tutorials

1. Wonderful videos to support in every aspect of your Mac Book experience
2. Learn all about iTunes with these videos
3. Mac For Beginners - pretty useful tutorials on this site
4. Beginner's Guide to Mac - nice little videos, guides, and tutorials

Tips and Tricks

1. Keyboard Shortcuts
2. Great article of 50 best Mac Tips
3. iPhone 6 Tips and Tricks