The best I've seen is a 2-step process using livingroomofsatoshi.com and blocktrades.us

• Setup the payment using livingroom, and choose the crypto you want to use (livingroom isn't accepting steem for the moment, or it would be a 1-stepper).
• Once you've got that done, you will need to transfer whatever the crypto is (I've been using Litecoin) to the wallet specified. Leave that window open, and open a new one to blocktrades.us
• on blocktrades specify the Steem Dolloars to convert, and choose the crypto you're converting to (Litecon etc..), and the amount.
• Enter the receive address, being the one on livingroom, and follow the transfer instructions..

Once completed, the livingroom tab will show successful transfer (it may take a few minutes of nervous waiting), and the money should get into you account within a day or two.