Tidying up "Open With"
Adobe Photoshop and ImageReady really clutter up the "Open With" context menu (in Finder) with lots of extra actions for images—things like "Constrain to 200x200 pixels.exe", "Slide Thumbnail.exe", etc. There's around 25 of them, which makes it much harder to select the proper image processing application.
These extra entries correspond to "Droplets", which are small image processing scripts. Thanks to this page, getting rid of them is simple:
cd /Applications/Adobe Photoshop CS2/Samples mv Droplets Droplets.hidden
[Edit 2008-07-19: Following these instructions may also be needed]