For independent contractors: how do you set up your business agreement?

A friend of mine just started freelancing and signed her first contract without really knowing what should be in it - no clause on payment terms, no scope of work, nothing on IP rights. It worked out this time, but it got me thinking about how many contractors just wing it. So, the questions to comunnity: how did you set yours agreement up? What resources did you use, where did you get stuck, and what do you wish someone had told you before you signed your first agreement?

Is that friend me? haha maybe...