Textures
Ahem, what’s a texture?
Well, people use textures for…. Scratch that, I use textures for cool effects/colorizations in graphics. It speeds up the process. For example, these 100×100px textures are great for making LJ icons in no time because they help you with colors etc.
Although, someone commented and told me that they are using mine for backgrounds–to what I don’t know–so, use them however.