How to find out where I sent my coins in 2011? I got into Bitcoin a while ago. 2011-ish. I build a miner and got a number of coins.
My storage wallet shows that I moved 4 coins to {long code} but I don't remember where I sent them. Is there any way to find them with that code? 
I think I was sending it to a trading site or some kind of online wallet. Maybe my mining client? I honestly just can't remember.
I would be willing to send a coin your way if I am able to recover the lost coins with your advice.
Thanks in advance.
-someone who should have paid more attention to what he was doing
(at least i didn't pay 10,000 for a pizza...)
Check your email account around that time to see if you created an account on a Bitcoin exchange, or if you got a deposit confirmation.

To find it more quickly, you could try to search your emails for the amount you sent, the address that you sent from, and the address that you sent to, because either might be contained in such a deposit confirmation or payment request.

As Jannes mentioned, you could also try to search for the receiving address on a block explorer, to see if the address or a succeeding address where the money was forwarded to is a known entity.

Unfortunately, the most commonly used exchanges from 2011 are now defunct. But it may be worth seeing if you sent it to a Bitstamp account as that was founded in 2011.