Other useful info aside from seatbelt advice: When you're at speed and the car's suddenly not pointed where it's supposed to be, get off the brakes, get off the gas, turn the wheel in the direction you want it to go, and be smooth with steering input. Get the vehicle pointed in the right direction first, THEN brake or accelarate as needed.
Not to monday morning quarterback anybody or anything. It can be hard to think straight when the shit hits the fan. Who knows if I'll even have the presence of mind to be able to follow my own advice if it happens to me. I kick the rear end out and drift on snow and ice from time to time at low speeds for fun and I've had a little training but have never really lost it at highway speeds and had to deal with that situation. But it's advice worth keeping in mind.
Usually when an SUV flips and it hasn't tripped over something it's not the initial swerve or sudden turn that causes it. First there's the sudden lost of control with the car veering in the wrong direction. The first swerve. It's actually the sudden panicky jerk of the wheel in the opposite direction to try to countersteer too quickly and too drastically that seals the deal and puts a truck on its roof.