Just my 2 cents...
DON'T get a research job. This is what I did, fresh out of college. I went to the University of Washington and worked in the dept. of medicine for 2+ years. As naive as I was, I was overworked, undercompensated, and starry-eyed about my chances of getting into UW after putting in a couple of years of hard work. I figured, "They'll see how serious I am" by relocating across the country, working crazy hours for peanuts, getting my name on pubs, and getting recs from senior faculty.
Pardon my french, but it didn't do sh**.
I ended up not getting in. In retrospect, this experience taught me a lot. Research is all well and good; however, if you are an aspiring physician, you're going to have all the time in the world to do more meaningful research than you will in ONE YEAR OFF between undergrad and med school. Plus, you won't even be starting a project until you have graduated - at that point, you will be sending in your AMCAS app and won't really have anything worthwhile to put on it. Plus, a lot of labs won't hire you for only a year.
If I were you, and I had a year to work, I would do something more lucrative than research. Work for a large business or a law or consulting firm, where they pay well and have good benefits. Do something medically unrelated - as I said before, you'll have plenty of time for research once you are a doctor. I think that this will also give you something interesting and different to talk about during your interviews. And you will also have time for clinical experience (for example, shadowing or hospital volunteering).
Take it from someone who's been there. I did the research gig. It was interesting, I will admit. But I don't think the payoff was necessarily worth the effort that such a position requires. I felt less important/effective in the lab than my co-workers, as I was by far the youngest and he only non-MD/PhD. It was extremely humbling (and not always in a good way) to realize that you are surrounded by people who understand a whole lot more than you do. I was frustrated a lot, and after some time, I began to lose interest because there were few rewards.
For the past year, I have held a "non-science" job, where I get all the hours I want and get paid more than twice what I was making as a scientist. And it's FAAAAAAR less stressful. There is no doubt in my mind that I still have a lot to contribute to the research community...I just think that I will have more to offer once I am an MD. And I will also have significantly less debt, because I chose a position that pays well and offers the opportunity for significant savings. And it certainly didn't hurt my chances of getting in - I was accepted this time around.
Please take this to heart. Unless you are dead-set on pursuing a particular research project, think long and hard about your motivations for going into research. I think that AdComms can tell if you took a job just so it'll "look good" on your application. And they will also know that a few months of research really doesn't mean squat. Don't waste your time...it really does = money. Good luck.