How to quit a crappy job because you got accepted to medical school and won't need them as a reference?

I just got accepted to medical school (WHOO HOO and thank God!). I work at a extremely boring and unfufilling job, with an awful/know it all/lying/rude/inconsiderate/boring supervisor. She micromanages to the extreme, doesn't trust/believe me, is paranoid, and puts everyone (Who's a doctor or been here for millions of years) on a pedastol. The position was sooo boring! I was on the bottom of the totem pole, there are not opportunities for advancement, and I only filed records and did mail runs (Yawn). So, I am finally in my career that I want with better opportunities and where I can actually put my degree, skills, and knowledge into use. They were collecting cobwebs at this job and I did not bust my for a biochem degree for this! How can I write a resignation letter? I am not going to work this kind of work again anyways so do I have to worry about not burning a bridge? As much as I want to tell them off, I won't feel right doing that but how can I tell them off professionally? Also, I told them during the interview I want this as a career but I was desperate and that was a lie in order for me to get this job. It pays a lot of money but I am bored and this is not what I want at all. Another thing, I got accepted, so I will not be going until this summer :S so I am fored to stay here until then. I just want to write it in advance and just in case I decide to quit early and give my 2 weeks notice then.