Depends on where you live (city, rural town, suburbs, etc). But I have found the best thing to do is establish some sort of routine that you stick to. Spend an hour every Sunday afternoon at the local coffee shop, take a morning walk every other day, stop by a local bar for a couple drinks every Friday evening. Go to the local farmer’s market every Saturday. Eventually you start seeing the same people over again and they will be open to talking to you since they recognize you now. Don’t force anything, but you would be surprised how easy it is to turn someone into a casual acquaintance