As someone who is applying for med school this cycle, I have done research for the past two years on what med schools are looking for, what you need to apply, etc.
1.) Major in anything you like. Adcoms don't care what you major in and will not be impressed what so ever with a double or even triple major. Just do well in 1 major.
2.) KILL THE MCATS. This is probably the most important step to med school.
3.) Volunteering is absolutely required. Med schools won't say it is, but in reality volunteering is essential. Shadow at least 1 doc or do volunteer work in a hospital.
4.) Do research. It will bolster your app.
5.) Make sure you get letters of recommendation only from professors that you know will write you a good letter.
6.) GETTING INTO MEDSCHOOL IS RIDICULOUSLY TOUGH AND EXPENSIVE! People get rejected all the time with 3.8-3.9 GPA and 30+ MCAT. Also, be prepared to spend at least $3000-$5000 on just the application process alone.
The whole application process is a crap shoot. Just take a look at a site like mdapps.com People who graduate from top institutions with 3.8 GPA and 34 MCAT have been rejected from medschools like Temple and Jefferson while people who have 3.6 GPA and 33 MCAT have been accepted to prestigious med schools like Vanderbilt, Virginia, UPenn, etc. The application process can be somewhat unpredictable.
www.studentdoctor.net is also a forum which is good sometimes for information, but the people that post on studentdoctor.net do not reflect reality much of the time.
Remember, when you apply to med school there are no "safety schools" to which you can apply. Getting into any medical school in this country is extremely difficult. Be sure to read the school's philosophy, student profile, etc. before you apply. Pick which schools you apply to very carefully.
Also, make sure you apply to every medical school in your state. That is a must. All states with medical schools give a huge preference to in state students who apply.
Also, think about taking sometime off after you graduate from college. Get some real world experience working, do some traveling, save some money, or volunteer even more. The average age of matriculants to medical school has been rising over the years and if I recall correctly, the average age of people who matriculate into medical school is now close to 24 years old. Med schools like more mature students who have gotten all the partying out of their system.
I am also very proud to say that according to AAMC's stats on med school matriculant data, we math majors have the highest rate of acceptance into medical school and also the highest averages on the MCAT. Just some food for thought.