Congratulations!
Remember: buying the right property the right way is important, but how you manage your rental will really determine how it performs.
Do yourself a favor: buy "Every Landlord's Legal Guide" by NOLO. Written by attorney investors, it's full of practical advice about the management of investment property, has sample forms that can be edited, and - most importantly - tells you what your primary state laws are and where you can read them. It's updated yearly and is the best $40 you'll spend as a Landlord.