How long should I hold onto blank CD/DVD spndles?

Get rid of them immediately!

What's are blank CDs and DVDs?

Were you bored? Is this why you created a poll? Or are you just looking for people to tell you to throw them out so you don't feel guilty?

Meh. You might need them eventually. Keep them until next year.

This thing wanted to install itself on my profile and that annoys me. I will comment instead.