I am a huge fan of using storage bobbins and a bobbin winder for spinning.
I use them because they are cheaper than buying more bobbins for my wheel. I rarely spin one project from start to finish without starting something else, so I store bunches of yarn.
Storage bobbins also help me work with color, to mix and match and just play with color in my spinning.
I use small stickers on the ends of the bobbins or loop tags around the bobbins to keep track of the yarn on them. I usually use both.
Last week I wrote a blog post about how using storage bobbins makes my yarn better on the Schacht blog.
I also use cardboard spools when I want to store more yardage on a single bobbin. Spools won't fit on my bobbin winder, so I use cooking skewers.
I bundle the skewers together with a rubber band and use an electric drill to wind them.
It's very easy to keep track of what's on a spool because I can write right on the end.
Do you use storage bobbins?