Having dozens of folders helps you categorize files in a better way, but it also makes it more difficult to find what you're exactly looking for, since they all look the same.
The best solution then is to give each folder a different color with iColorFolder. This simple tool also includes a few skins to change the folder's appearance, but I strongly recommend you to download the extra skin package available from the author's website.
After installing the program, folders will be automatically updated with the new skin selected by default, but you can change it afterwards and select a new color simply by right clicking on any folder you want to customize. And if you grow tired of so many colors there's also the possibility to go back to standard yellow folders.
iColorFolder is an easy, fun way to customize your icons and organize files in a more efficient way.