Windows 7 is fast, stable and far more reliable than we'd expect from a first public beta.
And while it doesn't include major new features, take the time to explore and you'll find lots of useful changes that will make a real difference in how you use your PC
1. Problem Steps Recorder
2. Burn images
3. Create and mount VHD files
4. Troubleshoot problems
5. Startup repair
6. Take control
7. Calculate more
8. Switch to a projector
9. Get a power efficiency report
10. Understanding System Restore
full list via techradar
1. Protect your MP3 files
2. Right-click everything
3. Fix the taskbar
4. Keyboard shortcuts
5. Customise UAC
6. Display your drives
7. Burn images
8. Speedy video access
9. Run web searches
10. Explore everywhere
via techradar
Windows 7 Keyboard Shortcuts
full list via maximumpc