Just read a little of the above link. Personally I think http://progit.org/ does a better job of a conceptual walk-through while at the same time giving you exactly what you need to get started tracking your projects. It also explains the different types of suggested collaboration strategies in a way that you think "ah that makes sense".
Personal thanks to Scott Chacon if he's reading =)
My favourite one is The Git Parable. It walks you through the steps you'd take to make you're own DCVS. Once you understand this, reading the man pages makes a lot more sense.
[1] http://www.eecs.harvard.edu/~cduan/technical/git/