Do ya have a rimfire handgun? I like to practice with rimfire varieties of my centerfires. Breeds familiarity and costs less, once you've covered the cost of the gun which doesn't take long. Any trigger time will help, whether it goes bang or not.

Lasers are great training tools, either grips or rail mounted. Keep that dot from moving off target throughout the trigger squeeze. You can even use a boresighter like the LazerLyte. It's not so much about sight alignment as it is about trigger control.