I know someetimes when I webdesign, I have blocks of pure color which don't look too great. What are your methods of "filling" the space? I guess what i"m asking is how you create textures... I know a lot of times, people will create subtle textures and overlay them on the block of color... what are your methods?

I usually use a photo and distort it (in size) so that it's unrecognizable and then just overlay it...