Yes all of the above, and don't forget friends and family can be good leads on your next investment, because somebody always has some information about a home or someone willing to sell their home.

My best success at locating investment deals however is the real estate agent.I will go into my local real estate agent and ask for a listing of all the houses in a specific area for a specific price and they will print it out for me and be on call when I need to see the property.