so i have started my own little repair business. made $100 so far and 5 clients. (i like saying clients

) all the clients are pretty far, but i live in a HUGE housing/apartment area, what do you think the most effective, least-offensive, inexpensive way is of letting people in the area know?
flyers on windshields?
flyer with tab-pull offs at post office?
passing them out in person?
leaving them under/on/in doors?
anything else?