Also, along the lines of the Terminal Chart.
Don't get intimidated by what you see. A lot of people initially will get intimidated, and will try to fly underneath the shelves just to save having to talk to Approach. Bad idea, especially if your not comfortable with Class B shelves. Chances are if you do that you will bust airspace somewhere and you could end up in big trouble for that one, especially a place as busy as Atlanta!
Study the charts way ahead of time (before you even leave on the trip) and figure out what direction you'll be coming from and what route you'll most likely take to your destination. Then become familiar with the various shelves in that area, and it never hurts to mark on your map where you should make your initial callup to Approach.
After you've done it once or twice and see how it works, you'll probably be just fine and not need to do all that. But it never hurts to be prepared, and you'll feel a lot more confident about it when you do!