Figuring out a farm area

[Brett Synicky]

Hi fellow BP agents,

I'm newly licensed and I'm looking to do what every licensee is trying to do.  Find leads!  Without a large marketing budget it's sweat equity for me.  But to keep myself from getting dizzy with analysis I've decided to farm a small geographical area that I'm already very familiar with.   I could narrow it down to a zip code but the 2 zips I'm interested in are 15 sq mi and 9 sq mi.  I'm not afraid to drive and walk a lot but those both seem too large to me.  My question to all of you is what criteria and resources should I be looking at to decide exactly which sq mi or 2 is best for me to start farming in?  

Thanks!