Over time I have discovered the sizes of scraps that I use most frequently. So I cut all my random scraps in 2.5 strips, 5 in squares and 10 in squares. For me, anything less than 2.5 goes into my bag to be used for dog beds for ASPCA. I do not try to tackle the whole pile of scraps all at one sitting, but from time to time I will press and cut for an afternoon and put the pieces in labled clear shoebox sized bins. I love diving in and pulling out color ways or just creating a purely scrappy quilt from my little pieces.
If you know what size you lean toward, cut your scraps in that size. It saves you time and is satisfying to use later on.