Here's a good idea. We all know that the Finder will let us put references to folders in both the Dock and Finder window sidebars. However, a row of generic folders in the Dock looks just like that...a row of generic folders. How do you know which is which? If you don't feel like hunting around for the perfect freeware desktop icon that says "2005 tax stuff,", check out FolderBrander.
It's a simple utility that lets you quickly add color or text to a folder's icon. The sliders let you position/skew your text so it looks right, and it will even work if you aren't using the default Aqua icons. Now your folders are identifiable at a glance.
FolderBrander requires Mac OS 10.3 or later and a single license will cost you $9.95US.