My yarn stash is not as large as some, but it is enough to give me options.
Riding in the car with my mother-in-law is not the time to work on a pattern requiring counting and concentration. That's when it's great to grab some yarn, needles and pattern and just work on a gauge swatch. So thank goodness I have an array of needles and yarn.
Ravelry.com was the perfect place to find projects. I entered the kind of yarn, approximately how much I had, my skill level and that I was looking for a hat pattern. Up popped scads of pictures accompanied by patterns.
My stash didn't grow with this yarn, but I have plenty of other leftovers. The stash is not trash.