Step 1 - Prepare an address to send the coins to. If you are buying something on littlebiggy with all of the coins you can click the pay button here to get this address. If not you will need a bitcoin wallet and address to store the coins. See separate posts about this or just ask me if you need help.
Step 2 Go to the ATM, note the store hours and bring ID (don't worry too much about this, if you are super concerned see the info about coinmixing)
Step 3 Pay cash into the machine and enter the address you want to send the coins to. Done.