Let you sphere ( personal contacts) know that you are licensed. Participate in networking groups, chamber events, and charitable events.
Know your market inside and out. Pick a farm area, or niche and get to know it very well. People are always talking about real estate. When you are knowledgeable about an area, it is easy to contribute something useful to the conversation. i.e. People may mention a property that they saw a sign in the yard, and you know the property because you visited it during a broker open. You know the recent price drops because you monitor the market. Being knowledgeable about the market will provide you an opportunity to engage in meaningful conversation. Doing that is far more important than trying to tell people how great you are; that can be a real turn off.
Go out and learn your inventory, meet other agents and brokers. Then, when the subject of real estate comes up, wherever you are.........the doctor's office, the train stop, a party, a business meeting, etc. you will have a way to participate that creates a positive impression.