I pre-wash for all the normal reasons - get rid of the bleeders, get the shrinking out of the way, and get rid of the chemicals. I then partially dry, sometimes in the dryer, sometimes not, and I press the fabric before putting it away. I have a huge stash, and pressed fabric takes less room and looks better. Sure I sometimes have to press again when I actually use it, but it's not as big a chore then. Think of pressing as petting the fabric and then it won't seem like work.