When you dry fire try putting a quarter on your front sight and then pull the trigger without it falling off. This won't work with many handgun front sights, but it will with a glock.

When your at the range have a friend or fellow shooter mix dummy rounds(can be bought anywhere for just about any caliber) with live ammo in your magazine. You'll be able to tell really quick if your jerking the gun around. It's also great for malfunciton drills.

For point shooting, you'll get much better at this as you improve your trigger pull and sight picture, but you can always tape over your front and back sight.