I feel like we need to know a little more about your situation. Is this a one time payment and one time conversion? Are you selling something like a car and want to receive their payment in BTC even if they can only pay in cash? Are you a landlord who wants to get paid in BTC? Is someone slowly paying a loan back to you? Are you selling stuff on Etsy?

The frequency and amount of the payment as well as whether or not you're meeting them in person all matter in determining the most appropriate method.

If you're a contractor or landlord, you can sign up at Bitwage and generate invoices that will be paid in cash but delivered to you in BTC. If you're selling a car or TV, then Circle sounds good. If someone is paying off a loan in person, then you can meet at a LibertyX store. You tell the cashier the pin code for the deposit and your friend hands over the cash to the cashier. You will immediately receive it in BTC.

You can do the same thing with any face to face exchange, like local Bitcoins or Mycelium's Buy/Sell feature. Your friend pays the seller and the seller gives you the BTC. Or just accept the cash and take it to the seller yourself. If the debtor is far away, they can even do the Mycelium or LBC buy themselves and just show the seller your deposit QR code.

How much, how often and how they are delivering the money to you all matter.