I'm allopathic 4th year (but been in school 5 years due to medical leave) so I'm responding more to your question in the allo forum. I will say up front that a fair amount of my med school experience was a train wreck (various reasons, many of them my fault) and I did NOT crush the boards. But I can tell you what I really WISH I'd done now that I'm nearing the finish line. Most of it is along the lines of what
@witzelsucht said, although I don't think I personally would've been able to go quite so hardcore. Most important thing to do, which I didn't until way too late, is get your head in the game and take care of yourself. At this stage, worry about doing your best now, not what's going to happen years down the road.
See a doc or therapist if you need to. Trust me, a LOT more of your classmates than you might think are doing this. Don't drink--ever since I quit I'm AMAZED at how much better I feel all around. Clean up your diet if you need to. Exercise (I went running several days a week after class, it's free and a good opportunity to listen to music). I agree to get up early, but I think giving yourself one day to sleep in and relax would help avoid burnout. Also, don't isolate yourself--hang out with your friends when you can, within reason, of course.
As far as specific resources to use, I honestly don't really remember anything other than Uworld and Pathoma so I can't give advice, but learn actively (hand write things, draw diagrams, whatever helps you). I agree to start Uworld in the first semester and copy down the important stuff in the answers by hand, and then maybe add a second resource later on (again, idk which is best). Not sure long your summer break is, but if it's the typical 2 months or so, take the first several weeks to decompress. Take a vacation, go home, whatever. Towards the end of the summer start doing some light prep for 2nd year but don't psych yourself out. Talk to some of the upperclassmen to get their advice about specifics.
Again, I'm no role model and this is only what I wish I'd done from the beginning. Hindsight is always 20/20, but I think this would have steered me in a good direction. As far as matching into specific residencies or moving up in rank a certain amount, I have no idea what's realistic. But I don't think you should "give up" on anything just yet. Don't limit yourself.