Try to find the different types of flight schools in your areas and them go and look at different consumer reporting websites to help you determine how they are rated and what other people have thought of them. Call and ask the actual school for references as well as testimonials.
Try to determine if the flight schools you are looking at use the most up to date and current flight simulators to aid in your instruction. Ask about the availability of the simulators and whether or not they have time constraints on how often you can use them to practice.