I don't know about you, but when working on a large project on whatever computer that happens to be, I get focused.
To the point where the next time I look up a couple of hours may have passed.
Doing that for long durations over the day can drastically reduce one's productivity.
Because of that, taking a break for 10 minutes or so to walk around or do something else away from the computer is important.
While onsite, have a stopwatch with countdown timer with you.
While working on the computer, have some sort of countdown timer going to ring after 50 minutes or so.
For the Mac, we have installed a Widget called 3-2-1. It works really well. It can be found here: BaldGeeks: 3-2-1.
For Windows Vista, there is the Sphere Timer.
So, take a break. It's good for you!
Microsoft Small Business Specialists
*All Mac on SBS posts are posted on our in-house iMac via the Safari Web browser.