On TechNet, Keith Ward has posted 77 Windows 7 Tips.

A few cool ones that are new to me:

• Shift to and from Explorer and CommandPrompt. The classic Windows power toy Open Command Prompt Here is now an integral part of Windows 7 Explorer. Hold down the shift key then right-click a folder to add this option to the property menu. While you're in a command prompt, if you want to open an Explorer window with the focus of the window on the current directory, enter start.
  
• RoboCopyCopyCopy. The always-useful Robocopy.exe can now run multi-threaded; run Robocopy /? to review its new parameters (like /MT for multithreading) and make your copies go faster
  
• Drag-and-Drop Notification Icons. The redesigned notification area displays only a minimum number of icons; all other notification icons are moved to a side window. Rather than using the Customize option to select icons for the main display, you can drag-and-drop icons from the side window to the notification area.
  
• Trigger Actions. Event Viewer is closely tied into Task Scheduler. You have the ability to take an event (select it in Event Viewer) and then from the Actions pane, select the option "Attach a Task" to have that event, when it appears, trigger an action. That action can be: launch a program; send an e-mail; or display a message. This feature may be very helpful in troubleshooting a problem.