Sleep. Get plenty of it. 8 hours a night is your minimum, but 10 is better. If you're in the gym that much and using your time productively, then recovery is going to be an issue. Sleeping helps you recover and keeps your hormones going the right direction.

Also, don't get too hung up with the scales. You say 145# and 15% fat. When someone mentioned 10%, you said you'd be too scrawny. Well, that's only one way to get to 10% bodyfat. The other way is to add muscle. If you would be happy at 145#/15%, then would you be disappointed if you were 150#/10%? My guess is that you would be happier with the latter. The scales can often cause unnecessary and unproductive stress.