I have a big basket that holds want to do stuff. Sometimes its just a pattern in a baggie. Some are fabrics with no pattern, or any other combination of ideas. Each idea is in its own bag so that i can add to it as i find more fabrics or the pattern. I also just keep a list in a ledger book of the projects in the basket. It works well for me because when i want to start something else, i just grab a bag and go. Right now there are about 20 projects in the basket. Mof course, I also have zillions of patterns saved on my ipad.