I saw this article over at PCWorld and it reminded me of a simple tip that you may or may not know.

If you hit the Control key and use the scroll mouse wheel at the same time, you make the text bigger or smaller, depending on what you need in you web browser. If you don’t have a scroll wheel, just use the Ctl + or Ctl – keys together to do the same function. This one is simple, but effective if you are showing someone some text over your shoulder or across the room.