What is the procedure to RENT out my house?

This varies a lot from place to place. In most states you simply advertise the house for rent. In some states you will be required to have an inspection from the municipality in which the house is located. This is often referred to as a certificate of occupancy. You should check with your local government to find this out. Usually the same agency that issues building permits.

You will also have to notify your insurance company and your rates will rise so be aware of that.

Kenneth gave you the in's and out's. Good Luck!