Heres a few suggestions that might help :)
(sorry for the bad english :-/)
1.Create a schedule for yourself. Go to sleep/get up a set time, bathe at a set time, etc; don't expect the schedule to be developed immediately, set a reasonable goal for yourself. if you have no real schedule currently then it would be good to start setting small schedule goals like how much time you spend in the shower or how much time you spend on the internet. the schedule should become natural for you, don't force it it might take months or years for it to set in as habit for you.
2.Take up a hobby. I collect music, for instance, and I've begun studying how to play the cello, I also mountain bike, and ski- these hobbies are extremely important for people like us. if you don't have something that you actually enjoy, and that is positive to your health and mind, to focus your energy on you start to decay socially, mentally, and emotionally.
3.Begin to slowly decrease your medication(since obviously the meds are a big part of your problem), but make sure you make your intention clear to your doctor and he'll come up with a plan for you. i assume you don't know how much to decrease your meds by and you don't know how frequently you should decrease your dose so you'll need a doctors opinion in order to smoothly come off the meds without going into a psychosis or something (I assume that you'll have to take a lot of flak from your parents but put up with it because the medication doesn't fix the problem, infact in most cases it actually adds to it, you just don't realize it yet.
4.Seek out natural treatments that might help balance you out (I have a book that I use as reference for stuff like this, its called "Prescription for Nutritional Healing" by James F. Balch, and Phyllis A. Balch, I suggest you check it out), I take a dose of liquid vitamin b12 in the morning, noon, and night- it works as well if not better than lithium (which is the best conventional medicinal treatment for bipolar. although your pychiatrist probably didn't tell you about that right? :( the fucking psychs try to pawn off all kinds of experimental medications on bipolars... im not absolutely sure why they do that, i think its because they know that lithium works but they want to test out other drugs on their patients that might just POSSIBLY work better than lithium. but regardless, if your taking anything other than lithium for you bipolar then you've been had) without any kind of weird unnatural effects.
5.go out and LIVE LIFE! there is so much to do and see, if we all just sit around and do nothing all day then we accomplish NOTHING and another day is wasted... so many people like you sit around, without a real care or motivation to do anything, hoping that the meds they take will solve all their problems and that they'll be happy. thats the problem with so many people in this world, they act like everything can be done TOMMOROW, and that today doesn't matter, but the truth is that today is all there is and all there ever will be. all suffering and pleasure will end eventually- whats important is not what you FEEL in any given moment, but what you experience in life as a whole and what you gain from that experience. you can really actually do anything you set your mind to, dont hold yourself back because you feel like you can't do something. its not a matter of whether or not CAN do it, but rather whether or not your WILLING to do it. its all a matter of how much time and effort your willing to sacrifice to a given goal.