Terrible pro tip: get in the car, start it, immediately start driving, but floor the accelerator and use the brake to travel at the speed you want. You'll have

Terrible pro tip: get in the car, start it, immediately start driving, but floor the accelerator and use the brake to travel at the speed you want. You'll have a warm passenger compartment in 1-2 minutes. It's absolute hell on the engine though. Don't do this with vehicles that you are responsible for. This is mostly only applicable for leased vehicles.