I know some of you may be reaching out to bittrex.com for the first time so you can determine how to convert SBD and STEEM into something else. Bittrex may seem a little different at first. I can explain the basics you need to navigate around. These methods are the ones I myself use so there may be better ways I am unaware of.

1.) Click on Wallets

2.) It may not show the currency you want here... it likely won't if it is currently 0 balance...

3.) Click in the search box and type steem

4.) To deposit steem dollars click on the + sign to the left of SteemDollars

5.) This will give you something like this but the address will be unique to you. This one is mine so don't send your currency here unless you intended to give me your SBD. :)

6.) Go to your wallet in Steemit. Then click on the drop down arrow next to steem dollars and click transfer.

7.) Fill in the next screen similar to how you see below. Only send SBD if you are using the SBD address. If you are sending steem instead of steem dollars the address will be a different one supplied by bittrex.

8.) It will take a few minutes and then it should show up in your wallet at bittrex. I don't have any SBD at bittrex at the moment and my friend @richq11 needed help so let's pretend these few bitshares I have there are SteemDollars. Click on the BLUE hyperlink for the currency you wish to trade for bitcoin.

9.) This screen is where you do the trading. I am going to go over the parts that you need to know at a minimum and how to do this.

10.) This is how much you have of that currency.

11.) This is how many units you are willing to sell at the moment.

12.) This is how many bitcoins per share you are willing to sell the coins in step 11 above for.

13.) This section is people wanting to buy the currency. This is where you will focus if you are converting your currency to bitcoin.

14.) This section is people selling this currency. This is where you will focus if you want to buy some of this currency using bitcoin.

So let's convert to bitcoin

1.) In this case the first seller has over 200 units of bitshares they are willing to purchase from people at a rate of 0.00003990 bitcoins per bitshare. I click on 0.00003990 and it immediately updates my asking price up above. Alternatively I could have manually typed in the asking price up in that box even something else if I am willing to set a price that is higher and I am trying to see if someone might decide to purchase it.

2.) You can click the MAX button and it will immediately set the amount of units to the total you own, or you can manually type in how many you wish to sell.

3.) Click sell steem dollars (or whatever currency you are selling). If there were people interested in buying that for that price or more then those transactions will happen and your bitcoin wallet will increase accordingly when you go back to wallets. Make sure steem is no longer typed into the search box on the wallet in order to see bitcoin.

Converting bitcoin to fiat money US Dollars, Euros, etc

Now I am only operating using US Dollars and I am using a Bitpay credit card. This only works in the U.S. I have heard that coinbase.com or coindesk.com have visa cards that can work in Europe and other countries. In the rest of this tutorial I am going to show you how I get money into my bitpay credit card.

1.) Here is my current Bitpay credit card screen.

2.) To add money click the + Add Funds button.

3.) Type in how many dollars you want to add to the bitpay visa card (You can get this at https://bitpay.com/card/ ).

4.) Click the continue button. It will go to a screen with a QR code and tells you how much bitcoin you'll need to send.

5.) I don't use QR codes so I click the tab that says Copy. This section has bitcoin amount AND the address to send it to that you can highlight and copy and paste.

6.) Back on bittrex in my wallet I click the - button to the left of my bitcoin wallet this is WITHDRAW.

7.) Fill in the boxes... paste the address from bitpay into address field. Put the amount of bitcoin into the quantity field and note there is a Tx fee in the gray section below it of 0.001 BTC so I add that to the amount in quantity.

8.) Click withdraw...

9.) Go to your email and you will be sent and email from Bittrex to verify you are okay with the withdrawal... click the link.

10.) Wait for your money to show up on bitpay.

Once you have money added to bitpay you can spend it just like you would any other visa or debit card.

I hope that helps... that is the basics, and may be more than you needed. I suspect everything else you need to know you can likely determine on your own. If not let me know in a reply.

EDIT: The bitpay card and the coinbase card both only work in the U.S.
If you are outside of the U.S. you might consider https://wirexapp.com/ which looks like it can be used in many places. Please note I do not endorse this or know much about it. I was just looking for something that might help those outside of the U.S. If you are in Canada @grandpere also pointed out that QuadrigaCX could possibly do the trick.