Your approach is

  1. Big left step
  2. Small right step
  3. On your last left step make sure it is stoppng you from going into the net
  4. Then jump

and vise versa for left handed palyers

When you are taking your approach make sure you are swinging your arms.

Watch video below to see this.

 

 

 
https://www.youtube.com/watch?v=FMtUqoxfR50