I totally stole this from Kate Good's Marketing Webinar but I think it is a FANTASTIC idea!

Find those residents who pay their rent on time and do something targeted specifically for them! Serve them dinner, take them out, show them you see that they make rent a priority! While you're at it, talk to them. Get to know them and you will learn what types of people you want to target for marketing--because you want more people who pay rent on time to come to your community.

Think about the buzz it will create! Those people are going to tell their friends and coworkers about the special treatment they get just for doing the right thing.