One thing I've learnt is not to bother with any new projects that don't already have a drummer. It seems like there's no good drummers available. That and avoid heavy pot smokers, even if they're nice people it's really frustrating when they're an hour late every rehearsal because they lost their keys, guitar, trousers, car (all genuinely used excuses from one pot head) plus you have to listen to their crazy ideas about the government controlling us.