Coffee (or Tea if British)
Get in car, shut drivers door
Key on DO NOT touch any pedals
Wait 30 seconds
Start. Expect abs and or traction control warning light on, that should clear after driving about 200 metres in a straight line to reserve steering angle sensor.
Remember all fuel trims will also be reset, may take up to a week of driving depending on what you're doing to get mixture and final idling sorted.