How to become a tenant farm?

[Nat C.]

I manage some of my properties whilst I have others assigned to property managers. I am wondering if other members can share their tips, tricks and advice for advertising and finding tenants for the properties I self manage? I'm not from the US and I don't think I'm working to my full potential. I've tried a few different websites and craigslist seems to be the only one which gets any responses. I'm sure there are some better ways for placing tenants.

Has anyone had much luck with placing signs out the front of the property?