1. Be 21 years or older
    2. Have proof that you are 21 years or older
    3. Go to Colorado
    4. Find a dispensary
    5. Go to the dispensary.
    6. Explain that you would like to buy recreational marijuana
    7. Show your id
    8. Optional [Wait until your name is called].
    9. Enter store
    10. Show your id to budtender.
    11. Chat with budtender.
    12. Decide what you want to buy.
    13. Pay with cash or possibly debit card.
    14. Exit store

Yes, it is that easy.