When you find yourself up to all hours of night trying to get what you are working on just right. Then you are in what creative people call the zone and you should go with it for when you get it together the rewards are great.
To many this is something new this zone thing, yet it is one of the most productive times you can come to know when ideas flow more freely and are easy to grasp and bring into this reality. Some have to prepare themselves for going into the zone and get rid of all distractions, the phone, T.V., and the like. This is because you want to concentrate on the ideas you will generate at this time when everyone else is asleep.
This is the time you will only focus on what your mind is trying to accomplish, not on what you have to do the next day. You should have a special location that you retire too, to get this work done because only you can do what you know to yourself to be possible.
Remember that anything your mind can conceive and believe it can achieve.