CTRL "+"
Please learn this keyboard shortcut! :P
Also CTRL "-" to get stuff smaller.

Get on the front page of any site and Ctrl+ ... The entire site will use the font size from then on... And will remember next time, so long as your cookies remain.
I keep my 15" laptop pretty much normal - If I have to, I will put on cheaters. But the browsers are a different story. I jack up the font site by site so I can comfortably read them without cheaters.
Ctrl+ to make font bigger.
Ctrl- to make font smaller.
Ctrl0 to reset font to normal.