Your SAT is slightly below the median, (which is 1470 this year, FYI, but then again I could be wrong, I don't know exactly how the new SAT works, I just multiplied your score by 2/3). You might want to bump it up, but then again you have time, I'm sure you will to that next year. Really, you have as much of a chance as anyone else. Just make sure you are valedictorian, and try to really focus on a couple of your ECs next year, try to really go in depth with a couple and maybe do something that club/organization has never done before. Also, definitely make sure to use your summers wisely. It's ok not to work, lots of admitted students, such as myself, will probably be working for the first time this summer, but if you don't work, either volunteer extensively, or take summer classes (I opted for summer classes). Also, look into Dartmouth, (try to schedule a visit not during peak 'tourist season' and you will get a more realistic, less orchestrated view of campus. Sophomore summer is a great time to start looking, because you won't be feeling the stress as much) and if you decide it's the place for you, definitely apply ED. It can only help you. Good luck!