Getting good GRE scores -- but don't hesitate to apply because of a low GRE score in one area if that area isn't absolutely crucial to your field. You CAN get into good schools with good funding with a low GRE in one area if you have other areas that are shining. I'm proof.
Making sure I only applied to programs that I was an absolute fit for.
Demonstrating through EVERYTHING that I was an absolute fit for that program. I mean writing sample, resume, SOP, everything. Highlight what makes you fit for that program, but remain absolutely honest at the same time.
They will appreciate that you know you fit, and appreciate that you have other facets as well.
Finally, stay in contact with the department. Show you are interested. Be proactive. Don't be a pest, but don't sit in the background invisible and wait for some rain from on high. Let them know that you care about their program, and most importantly - make sure you really do care about the program.
I deeply care about every program I applied to. I seriously love them all and don't know how I am going to choose. And, I think that came across in my applications.
Oh, and did I mention that contacting professors is probably the most important thing?
By the way, I must repeat that contacting professors helps. Even if you don't get in - you get a network of scholars that can be invaluable in the future.
