I'm fortunate to have a decent stash to pick from so once I decide on the colors I start pulling fabrics off the shelf. Then I line them up on the cutting table in the order I think I want them and leave them there for a couple days or more. I'll walk past the table and stop to look at them to see if I still like them as they are or move them around or even add/subtract from the pile. Am working on a couple log cabin lap quilts right now which I used this plan of attack. Even yesterday while cutting the strips I changed the order around. Most times this works for me.