After finding an advisor they think they would like, I would recommend going to the library and getting a few papers by that person and then finding out if he has any students currently working with him that would be willing to comunicate with you what he is like as an advisor. I think that finding the right advisor is the most important key to success in graduate school. I feel that UGA prepared me very well for graduate school. The good parts about graduate school are that you have a very flexible schedule, and a lot of freedom to explore whatever subject areas interest you. The bad points are that it requires a lot of self motivation and it really makes you face how very little you actually know.
Graduate school can be an extremely humbling experience.