In 4 simple steps.
- Visit http://bitcoin.org/en/choose-your-wallet and select a wallet that suits your requirements.
- Once you get a Bitcoin address, your account has been setup. This process is generally completed in 2-3 minutes.
- Print out the image below and stick it on your shop window near the cash counter and outside your shop.
4. Accept Bitcoin using the address created from the wallet of your choice.
Disclaimer: Do read a bit about Bitcoin before diving in.