I recently purchased a yarn winder to help organize my yarn stash, and wind skeins that had came in hanks. After reading different reviews for various winders I settled on a Stanwood Needlecraft winder, which I bought off amazon.
Hanks of yarn.
All done winding! It is a little time consuming to wind but having the yarn in neat little cakes helps a great deal while crocheting, and saves the skein from rolling around or getting making a tangled mess if the skein isn't meant for a inner pull. The cakes also stack much neater.
The difference between the skein and cake of yarn. Saves so much space! And is rather relaxing if I say so myself.