1. You definitely want a home warranty, that way when things break, you can just call them and pay the service fee rather than having to come out of pocket for repairs.
2. Call your insurance company and make sure that your policy is a RENTER policy, otherwise if something goes wrong, they may not cover it.
3. 100% of everything you do with that property is tax deductible. Everything. That's HOA fees, gas used while driving there, advertising fees, etc... it's a beautiful thing.
4. Don't be afraid to turn down potentially bad tenants.