Here's another tip that I've been using for a while. Never go above 70% sleep, unless you feel it's necessary. What you can do is while you are waiting for stuff to process, or when radar dishes are turning, just take a quick nap and wake up when it's done. Repeat this and you will get through your tasks quick. It'll at least pass the time quicker when you have nothing else to do. So long as you're below 70%, you can sleep.