there are a bazillion different approaches on the psychological level, such as what the others suggested, that may or may not inspire you, but most of the time overlooked is serving biological needs that increase creativity for anyone. It's not a "may or not" approach, it just works. Such things are:
Drinking enough water
- Dehydration causes fatigue, fatigue slows your brain activity down and reduces focus. A slower brain also means time will seem to fly by faster! What that means is say you count from 1 to 10 in good condition and it takes you 10 seconds exactly, now when you're dehydrated you count from 1 to 10 at what seems to you to be the exact same speed as before in good condition but it actually takes you longer and maybe 11-12 seconds have passed.
- Building muscle strength and endurance will reduce fatigue, increase your energy levels and your overall health.
- Feeling tense? Stretching daily will help you relax not only your muscles but also your mind.
- The increased heart rate during the exercise will increase oxygen delivery to your brain, which will increase overall brain activity. This is why M4uesviecr has been "hit with inspiration" before when exercising.
- Stay away from sugars. They give a quick energy burst, that doesn't last long however and afterwards your energy will be reduced drastically. If you really need an energy burst consume natural sugar instead (1 tablespoon of honey works great).
- There's lots of info on this on the web so I'm not going to go into detail on how to keep one, but a healthy diet will increase your energy levels and overall health much like excercising. Both should be done in accordance to receive the greatest benefits.
The human body is like a machine. You can oil it well and keep it clean or let it rust and dust, but don't be surprised if you lack inspiration when you neglect your body's needs. ;)
I highly recommend the book 'Bruce Lee - The Art of Expressing the Human Body' which covers great exercises for bodybuilding, stretching, cardio, and in-depth knowledge on why and how it is good for you, as well as a section devoted to 'Fueling the Dragon (Nutrition)'.
Cheers and best of luck with your project!