What should I do?

I have been thinking a lot lately about what crochet item I should make next.  But I don't know what to do!  Maybe it is hard to choose because I don't have enough yarn to really begin another project...  I have a couple of projects that I have already started but have not finished yet and I kinda am not ready to tackle them either.  The yarn I have now is just scrap yarn and I can't even make a scrap yarn project because the yarns are so different from one another...  What should I do.  I don't really want to buy yarn but if I don't have yarn how can I crochet?  Maybe I should try another craft for a while until I get some yarn.  Maybe I will do that.