I went back and began reading all of the posts to this thread. Woodstock!!!
One thing that I have done in the past year is that immediately after cutting pieces for a quilt, I cut the remainders, scraps into standardized "pre-cuts". This is particularly useful when trimming and squaring up the quilt just before the binding go on. I cut off that excess backing and cut it into usually 2.5 strips or 2.5 squares. this often gives me 10 - 12 squares of the same fabric. This seems to neuter the little things and they stay under control. I make 4 or 5 quilts per year using 2.5 squares and having so many on hand helps.
I also am liking the post about just donating the scraps when they get to a certain amount. Why am I keeping all of this when someone else could use them? This is thought worth considering. Ah, a deep breath of fresh air!