Antenna mentions a very useful and simple trick to create clickable labels for form-elements in Internet Explorer (something I had up until now been using Javascript-hrefs for):
<INPUT TYPE="checkbox" ID="foo">
<LABEL FOR="foo">click me</LABEL>
I'd like to expand on that and recommend adding LABEL { cursor:hand; } to your style sheet definition so people realise they can actually click on the labels.
For the gamers: "Everything I Needed To Know I Learned From FPS", Part I and Part 2. [via spilth.org]