Yup, too much computer is VERY harmful. You should always try to work less on computer, believe me, I'm working on a computer a long time and I have fucked up back, my vision has gone from perfect to bad, my neck is hurting me all the time. So, my plan is to work less in 2009 and earn more
Try to do as much of work off computer. So if you have brainstorming, planing etc. go on the bed, chair, kitchen, living room and write that stuff on the notepad. Try to recreate and do as much sport as you can, go outside on the fresh air when you can. I'm not doing this stuff enough and I see the result, my bad health and lack of motivation over time. When you do sports regularly you will be more happy and you will think more clearly, so ideas for making money will pop up all the time
Try to organize your stuff in to the routine because this is the way we work so you will much easier go to exercise and similar. We live in cycles so try to organize your work for about 90minutes in 1 cycle and then make a break and stretch yourself, run in place, jump to get your heart pumping. One one last thing, do not work in multitasking mode
but concentrate on 1 thing and you will be much more effective. (Those are couple of tips I've picked up from Eban Pagans courses)
LCD monitors are far better then CRT but still you should use them less because when you look at the light (monitor) you effect your vision, your brain etc. and you should also eat healthy (more healthier then other people that don't work on computer).
