What is the most productive thing I can do with this right now? I've been currently switching between solo mining for 12 hrs, and pool mining for the other 12 hrs. Anyone got a better idea? alt coins?
Solo mining with a USB block erupter is not feasible. The chances of you finding the next block are about 1/3,000,000. It's better than the lottery, but it is still likely to never happen.
Mining with a block erupter will still earn about 0.01 BTC, so until it costs you more in electricity, you might as well keep mining.