To recharge the brain, one can:

1. Take a nap
2. Go for a brisk walk
3. Lie in a nearby park or on a bench and watch the clouds go by
4. Listen to music or even podcast novels
5. Browse a local bookstore
6. Stroll through a nearby art gallery
7. Get a coffee in a cafe and read the paper or, even better, a gossip magazine
8. Hit the gym
9. Meditate or do yoga
10. Hang out at the local dog run and get in touch with your animal nature
11. Memorize poetry
12. Sit on the corner and sketch buildings
13. Window shop
14. Get a massage
15. Do math problems or crosswords

The main thing is to get away from the current situation or place, to do something that uses a completely different part of the brain than the creative work does, and get ones mind off of what one was doing and stimulated with fresh ideas, images and inspirations. One will come back recharged, refreshed, and ready to plunge full speed ahead.