Leave one in your shopping cart.
Through conversation with your local cashiers from grocery, department stores or gas stations.
Leave one on the seat if a train or bus
Your bus stop. (Lots of people would see it)
When someone hands you their business card you can always hand them yours. A great way to get exposure and swap contact information. And you both might want each others service 🙂
Any bulletin boards around your neighborhood or stores.
On a college campus. This is key for me because I will be back at campus soon and it will be some great exposure to pin some cards to the board!
Comment to add some more helpful ways!