I keep a folder on my desktop of "Quilt Ideas". When I find a pattern on one of the fabric makers web sites that I like, I file the PDF into my folder.
I've yet to make one - but I've not been collecting them very long (and have already had projects in process). I do know though that I'll probably choose all my own fabrics.
Choosing fabric is the part I like the best. There's no way I'm going to skip that part.