Major in something you really love. Sometimes "that History major guy" or "that Political Science gal" will stick out in the minds of an Adcom member than your run of the mill pre-med. But keep in mind that we really don't care about majors or minors, only that you do well. And consider a major that will provide you a career pathway in case Medicine doesn't work out. I recommend against Art History or English.
Not all volunteering needs to be in a hospital. Think hospice, Planned Parenthood, nursing homes, rehab facilities, crisis hotlines, camps for sick children, or clinics. Some of my successful advisees have gotten IIs from top schools due to having hundreds, if not thousands of hours of clinical experience.
Service need not be "unique". If you can alleviate suffering in your community through service to the poor, homeless, illiterate, fatherless, etc, you are meeting an otherwise unmet need and learning more about the lives of the people (or types of people) who will someday be your patients. Check out your local houses of worship for volunteer opportunities.
Examples include: Habitat for Humanity, Ronald McDonald House, Humane Society, crisis hotlines, soup kitchen, food pantry, homeless or women’s shelter, after-school tutoring for students or coaching a sport in a poor school district, teaching ESL to adults at a community center, Big Brothers/Big Sisters, or Meals on Wheels.
Some types of volunteer activities are more appealing than others. Volunteering in a nice suburban hospital is all very well and good and all, but doesn't show that you're willing to dig in and get your hands dirty in the same way that working with the developmentally disabled (or homeless, the dying, or Alzheimers or mentally ill or elderly or ESL or domestic, rural impoverished) does. The uncomfortable situations are the ones that really demonstrate your altruism and get you 'brownie points'. Plus, they frankly teach you more -- they develop your compassion and humanity in ways comfortable situations can't.
When i apply to medical school i want to stand out from the thousands of applications they receive. Which subject should i major in? I want to major in biology or chemistry specifically for medical school but i know that doesn't really stand out and If the medical school route doesn't work out I don't know what to do with those degree. A lot of people tell me to major in whatever i enjoy doing but the only thing i want to do is be a surgeon...
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Also should i be more involved in stuff so when my time comes to apply to med school i can at least have something on it. I have no sports, i don't read, i haven't done research. I haven't really done anything except for volunteer in the hospital for 6 months.