I really find a routine helps. Getting into that routine is hard as nails, but once you're in, it can even be hard to stop! I started a new workout route, recently, which is essentially workout every other day, so I get a full day of rest, no matter how much I workout the previous day (meaning I can go crazy and do 2 full body workouts if I wanted, like yesterday xD) as long as I get that day's rest. It's working out well. Routine does wonders.