Work Options with a laptop while traveling?

O.k., so I've been throwing some thoughts around recently about traveling and working. I have a laptop and I'm (very) regularly on the internet.
So the question is, what jobs/work could I potentially do? Since they always talk about work that can be done while away from a desk, so is there options for work that can be done while traveling (or even where I'm only online every 3-4 days)?
Now obviously, I'm not talking full-time or amazing salary-type jobs, but if there was the possibility of supplementing my income (or lack of ;), does anyone have ideas?

All ideas welcome, and make sure to put them in the comments, not email to me so that they may be of benefit to others......