Faster resume (screen shows up immediately like Vista, keyboard is available for typing in password immediately, while Vista took 10 or 20 seconds for it to become ready)
Notification of what program has locked a file (e.g. if you're trying to delete it); haven't seen yet whether the same is true for Safely Remove
Safely Remove shows drive letters for devices, also shows my eSATA drive (along with the internal drives) that Vista didn't show (required an extra utility)
Apparently these were also in Vista, and I just never knew: Shift-Right-Click on a file shows an option for copying the path, and Shift-Right-Click on a folder shows an option to open a command prompt.
Stop Certain Devices from Waking Up the Computer
For a mouse:
Go into the Mouse properties
Under the Hardware tab, select the device in question and click Properties
Click "Change Settings"
Under the Power Management tab, uncheck "Allow this device to wake the computer"
Fix Audio with Restarting
I'm not sure in which situations this works, but it worked for me at least once when the playback device was shown as unplugged.
From SuperUser: Is there a way to restart audio without restarting a Windows 7 computer?
net stop audiosrv
net stop AudioEndpointBuilder
net start audiosrv
If one hangs when stopping, you can try killing the process.
To get the PID:
sc queryex <service name> e.g.
sc queryex AudioEndpointBuilder
To kill the process:
taskkill /f /pid <PID> e.g.
taskkill /f /pid 1492