you have to get used to the position drops put you in... it took me about 4 weeks after getting my first bike with drops to actually be able to say that i'm used to riding the bike... before that, i couldn't even ride for 10 miles being on the drops all the time... or else my back will get sore... another thing to try is to keep your back straight... most of the Internet tips i have read suggest to keep your back curved to help absorb shocks... but i find that it feels a lot better if you keep your back straight imagining that you're trying to touch your stomach to the top bar... also, try to bend enough so that your elbows are well bent...