I have an A5 ring binder with some punched pockets and I slip extra bits in there. That is my secondary storage system. My first one consists of leaving them on my desk for a while so that when I need to make a quick card I have something to grab. Quite often the die cut will get together with a scrap of patterned paper (also on my desk) and I will notice it after a few days and think 'hmm that works quite well together'������.