There are a number of ways to categorize you'r stash.
- Weight (cobweb, lace, fingering, DK and so on)
- Material (Acrylic, wool, mix, cotton and so on)
- Size/project (Sweater sized lots, for scarfs)
The list could probably go on. Why don't you leave a comment how you do, that is always interesting to hear.
I have started to sort my yarns in weight and color so that I can easily access the weight and color I would like. In an earlier post I talked about putting up my stash into Ravelry and I still think it's a good idea, I have noticed that you can use a list function for your stash and there you can choose to sort on weight, length, grams, skeins or even name. That way your stash on Ravelry gets more manageable and gives you a better view of what you have. After checking on that you can choose to go to the pattern search function and start to view diffrent projects you can make of your stash.