Down to the basics
After you have parked your car safely, put a couple of bricks or stones beneath the tyres to make sure that it does not roll down. Bring your jack, spare wheel and lug wrench to the work area. Loosen the nuts without having jacked up the car, to prevent the wheel spin on you. Turn counterclockwise to loosen the nut until it comes off. Next jack up the car. Remove the old wheel now.