Before warming up, you'll want to get into proper singing posture. To find this position:

1. Stand with your back against a wall and your heels about two inches from the wall.
2. Your feet should be shoulder-width apart, your arms should hang loosely at your sides and your butt should be slightly tucked under.
3. Roll your hips forward and relax your jaw.
4. Push the small of your back against the wall and keep your head level.
5. Your shoulders should be back and your chest somewhat puffed out.