Overcoming Writers Block: "Ooof, the nastiest till last eh? All that work and it's still not right. OK, well, for me, some physical exercise to give my brain a break and take my mind off it, followed by, yep you guessed it, a large shot of caffeine and 2 hours at least away from any distraction. (My wife knows the look ;) )
My other trick for this sort of stuff is deep relaxation - I use self hypnosis techniques. It is increadible how your brain can 'take off' after 20 minutes of proper relaxation. Incidentally, it's well documented why as well. The brain needs about 20 minutes of 'rest' every 1.5 to 2 hours (See 'The 20 Minute Break by Ernest Rossi') "