You are going to want to be familiar with legal paperwork/rental agreements...
For determining rent ect, then these sites should help for trends/rent comparables...
http://www.zilpy.com/ ... http://www.rentometer.com/
You might want to consider selecting some repair instruction/advice resource like this for reference.
Tenant selection is something to learn about also.... http://ezinearticles.com/?Tenant-Selection---Process-Or-Skil
I sure others will provide more or better info but the main thing to remember IMHO is you cannot prepare too much.
Good luck, Dunes