Technet have a list of 77 windows 7 tips posted. It covers

Shift to and from

Explorer and  CommandPrompt

Embrace

Troubleshooting

Packs

Configure User Account

Control (UAC)

60 Get More Windows

PowerShell

You can read all the 77 Tips here. If you are a windows 7 user or planing to move to windows 7 it worth a read