Noise and distraction are not great for finding your inner peace, so make sure before you begin find a place of quiet and solitude.
When it's time to meditate make sure you can sit on a comfortable chair. Your arms should be resting , and put your feet be side by side. You also need to be grounded, so connect to the floor.
Focus inward, and if you like you can even lie down, but don't do this if you are tired, meditating needs your attention, falling asleep defeats the purpose. If you do decide to lie down make sure your legs are side by side, and feel the mattress under your body.
If you find yourself needing to scratch yourself this might well be an indication that your Ego is unwilling to let go of control as it realizes you are about to enter a state of deep relaxation. In this case its time for the last step.
Now breath in and out slowly, and let the guided meditation take you out of your Ego to find your inner peace.