For anyone that uses Cryptsy, they have just enabled an auto sell feature once your coins are deposited:
A new feature has been added to deposits. You may now initiate automatic sells on deposited funds at the moment of deposit. Click deposit next to your coin of choice for more information.
I would not recommend using this if you actually want to maximize profitability. The instant-sell will only keep the values dropping faster. I will buy at a lower cost than you can produce. You will pay me to make money. Understand?
(On second thought I should probably stfu and just let ignorance bloom so I can take advantage of others laziness)
Happy happy mining!