I follow along with the hints on Mac OS X Hints
but generally don't use what comes by. In the past I have pulled out the hint/hack on how to get ones cell phone that support bluetooth sync to sync with Sync.app. And now another has finally come along that I have started to use. This one is on how to auto-hide the dock and menubar on a per-app basis
and it is very easy and useful. The dock is easy to hide and I leave it hidden all the time, but now the ability to hide the menubar on a per app basis is very nice.
For what it's worth.