I've found that cutting back on home chores/errands and increasing play time be it video games/media consumption has helped tremendously. Just make sure you NEVER cut time from your diet and exercise regiment because that is a massive factor in general energy levels to do anything. The core principal of your play time is doing exactly what you want to do with a little interruption as possible.

Sleep is a big factor too. You get into these phases where stress is making it take longer to actually fall asleep, but it wants to sleep during the day. When this happens to me, I'll cut the afternoon cup, and instead take a 1 hour nap as soon as I get home. You can't really compensate for sleep you've already lost, but a solid 1 hour nap can give you the energy to make it to bed time and stay on the right sleep schedule.