What to do?

It has been a couple of crazy nights this week, with my son waking up 2 or 3 times a night. He is also waking up at 4 in the morning and staying up. This is a habit that we want to stop but we are at a loss as to how. He needs his nap during the day or he is ridiculously cranky before bedtime. It is a little frustrating. It's either sleep but have a cranky boy all day or no sleep and have a happy boy all day! Decisions, decisions. It doesn't help that my temperament parallels his. If I don't get sleep you don't want to talk to me... or even look at me funny. Poor Scott :(