To have the right footing and edges make sure you are in skaters position with a 90 degree knee bend.
As you go down the straight-away keep your skates close together. Your left foot should be your leading foot. In other words, your left foot should be just ahead of your right skate.
As you begin to cross, remember to step down close to your other foot. This will help you to have more range of motion for your push.
When you cross down the straight-away, try not to step out that much because it could cause you to mess up your edges.