Become a Broker of Record
A broker of record is a person who holds a broker's license in a specific state that acts as an in-state broker for an out-of-state broker.
The biggest market for this is commercial real estate, especially single tenant NNN deals. When an out-of-state broker wants to buy or sell in a state where he does not possess a license, the broker must contract with an in-state broker. YOU COULD BE THE IN-STATE BROKER FOR YOUR STATE.
Broker of Record is an easy way to earn passive income with your broker's license, brokers can earn as much as $2,000 for doing very little (varies by State).