Useful Firebug / Print Styles Tip
I just discovered if you leave the Firebug window open when you do a "Print Preview" you'll be able to use Firebug to look at your print DOM/CSS! The "Inspect" picker doesn't work, but you can at least browse through the DOM and find where errant padding etc is coming from in your print stylesheet. Hella useful.
How did we ever manage do this job without Firebug? (Rhetorical question, but answer is: a lot slower)