If you store any of your coins outside of an exchange and you encript your wallet, please make sure you wright down your password/passpharse. I had 92 Dash stored in the Dash Wallet QT and could not remember the password for the last three days. I created the passpharse last month, but I sort of changed my normal passwords I would use. Every hour that I was not working, I had my ass at my computer typing in everything and I tried to brute force the wallet.
After I figured I had nothing to lose, I even sent my wallet with pontential passwords to someone for help. If he figured out my passpharse and took the coins, it would have been no worse than them being locked up and he was only charging 20% of the wallet. I was more concerned with him trying to get into other accounts, so I changed all of them before sending my info. After all that, I sat down again and wrote down each guess and got lucky.
I think I may just leave my coins in a exchange and take the hit if something goes wrong there. I don't want to risk something going wrong with my computer (other device) or something going wrong with my mind again. Even if I take anything off the exchange, I may not lock the wallet.
Whatever you do, make sure to write down your password/passpharse. Normally no one will be able to help you change the password and the only option will be a brute force attack on the wallet. The problem is that you would need a clue what your passphrase was or it is not likely to work.