You seem to think it is a piece of cake to get in to any of these schools. It isn't quite that easy, but if you get started now and start talking to admissions counselors, you will have a pretty good start on it.
Tip #1: Take the GMAT. These schools say they will accept the GRE, but the GMAT has been the standard for ages. I applied to three schools with just GRE scores (a 334) and didn't even get an interview. After taking the GMAT I had admits as well as three excellent scholarship offers. The difference probably wasn't 100% the GRE/GMAT, but I think it definitely helped.
Tip #2: If you feel too good for a school, don't apply there. Nobody wants to be around that one person who is just there because it is the only place that let them in. Only apply places you actively want to attend.
2a: I always thought of "tiers" of schools. The top 4 or 5 (maybe as many as 7) have the brand and history to be a cut above the rest. The next 6-10 are all excellent as well, but not quite best-of-the-best. I would never assume anything in the top 15 is a safe bet of admission.
Tip #3: Each school has its own thing going for it. You should dive into which schools do well in what you would like to enter instead of just pulling from the overall rankings. (For example, I believe Tepper, ranked around #15-20, has an Operations program that is right up with Sloan's, despite the overall lower ranking of Tepper.) Furthermore, schools are much, much more than the stats of their applicants.
Tip #4: You need to have your own personal story down. You won't get in to any of the top 15 based on GPA and test scores alone. You need to highlight a few of your best traits to the admissions officers in your application and interview.
Good luck!