Another Organization Idea!
Once I have collected all of the parts i.e. yarn, buttons, pattern, zipper [fabric, pattern, buttons, notions, thread, zipper, etc.] I put them into a zip-loc bag or clear tote — I know, plastic 😦 — and they are placed on my Designated Project Shelf.
That way I never use yarn / fabric / buttons, etc. I bought for one project for another project (not saying that Never happens — new ideas do emerge and flexibility reigns!), plus when I’m ready to start a project everything is in one spot ready to go.