As above, major in what you love. There's some benefit to breaking the mold--my art major was somewhat unusual so it made for an easy ice breaker on my interviews. I did great on the MCAT and all I did was take the pre-reqs, do the practice tests, and study Examkrackers (not sure if that's still around) for a few weeks (I took all my pre-reqs over the course of one year and got A/A-'s, so everything was pretty fresh). N=1 there obviously.
Minors are useless--they really are. No one cares about them, and honestly it looks kind of silly when I see a minor listed on someone's resume. Most of the time I even forget I had a minor. That's how useless it was. The only reason I even got the minor was it had been my major before I changed, so I'd already met the requirements of the minor.
My earnest recommendation is to:
1) Major in something you really enjoy and would be happy to study further/pursue as a career if you can't get into med school.
2) Take the pre-reqs. And know that material well--get A/A-'s, and retain that info (it's amazing how much you forget after even a few months)
2) Forget double-majors, minors, etc., and just take whatever electives you find interesting/always wanted to learn more about. That'll take you much further in life. My religious studies courses were among my favorite and still most helpful. If you want to take advanced science courses for fun/interest, then go for that, but don't take them for the MCAT. It'd probably be more worthwhile to just sit in on the pre-reqs again/use that time to re-learn them.