It sounds patronizing, but it is the truth: You need to do enough of everything to figure out whether or not medicine is for you. You may have fathers. brother, uncles and grandparents who are physicians, but you's still better have done a thorough job of shadowing doctors yourself and being exposed to the clinical side of medicine.
A GPA of 3.5+ is usually seen as a minimum and a 30+ MCAT seems to be pretty "safe" if anything in this game is safe.
You need to pursue areas of giving back to your community and areas of life that show that you are a well rounded person.
You might go Greek, work a part time job, play a college sport, shadow a doctor, volunteer in a homeless shelter, volunteer in a hospital, do an organised medically related internship, have some hobbies and a life, oh and toss in some research, too. You might have done all of these and more
BUT, don't do those things to look good to an adcom, do them to explore and find your interests. Find opportunities that sincerely both allow you to explore the field and to determine where your interests lie.
Some leadership along the way would be helpful and you'd better get to know your profs so you can get some sincere and solid LORs!
Then when you have done all that, be sure to begin your PS in early spring, have it read by others and be ready apply to AMCAS in JUNE and begin asking for LORs in fall of the year prior to the summer you apply, then begin collecting them in spring so you will have them in time to complete your file early. Schedule yourself some serious availablility to write secondaries in July & August. Try to have a fall schedule that leave Fridays with no classes and is in general somewhat lighter than prior terms or apply during a gap year so you do not blow your senior grades when you miss classes to travel for interviews.
HS students come onto this board all the time asking how to do the top 10 med school track. My advice is don't worry about that, just worry about getting in somewhere. If you set up your college life to be on track for a med school app and change your mind later, you should be able to use those same activities and grades toward any grad school or work place goal. Just be sincere and do it for the right reasons, it is too difficult to be on track every single day for 4 years of undergrad unless it is for the right reasons.
If you are a premed applicant you have to be aware, a moments inattention gets you a B+, too many B+/A- marks lower your GPA. You cannot afford to find yourself in two years of partying and learning how to really study. You do not have to be a keener with no fun and no life, but you have to be quite self-motivate and self-directed as well as organised from day 1.
Thisis the rest of your life, do it for the right reasons.