Here's a nifty list of things to make your days more productive (very good for pay-per-job workers).
1.) Be proactive -- schedule up everything. Wake up early, plan your meals, schedule your naps and etc.
2.) Keep away from all the distraction -- distractions? Don't get carried by the television, e-mail notifications, games, unnecessary text conversations or even the telephone ring (except when you communicate your client this way).
3.) Time yourself -- try to figure out what you were thinking or doing when got the best time (shortest time).
4.) Relax -- studies show that you are more productive when relaxed than when panicking.
5.) Eat right -- don't eat less, don't eat more. They can cause an unplanned trip to the toilet or another kitchen work.
6.) Think positively -- you have to be optimistic, especially when running out of time. Just relax, increase your pace gradually and enjoy your work.
7.) Scribble and scribble -- scribbling on a notebook is a nice way to express. Remember that it's easier to plot ideas on a physical notebook than in a computer.
8.) Be motivated -- a good background music can help you. I'd prefer string quartets or other types of music without lyrics to stay focused.
9.) Set your goals -- you have to set a goal every once in a while. Set deadlines even with the little things. (e.g. the about me should be at least 75% complete by 5:30pm)
10.) Take breaks -- schedule nap times, eye exercises, some stretching and other light exercises once in a while. This should make you feel better especially after hours of sitting in front of the computer.