Currently working on my third scrap quilt this year. I slowly started using my scraps only in the past few years. I struggled to do scrappy quilts as I felt overwhelmed. Reminding myself to only worry about what fabrics are next to each other have been very freeing for me.
In fact I really have been enjoying them. Each quilt is a personal story. I remember where the scraps had come from - successes and failures. It's like a road map of my quilts.
Since I haven't been using my scraps until recently, I am still in the process of finding a system I like. Currently I have clear plastic containers of crumbs, string fabric, strip fabrics 1 1/2" to 3" and a box of larger pieces. Anything about the size of fat quarter goes in containers for that and I have a container for less than a yard to over a FQ size. It seems to work for me for now.