After learning about conditioning in psychology I realized I could use it to my advantage. There are a couple of ways you could use it.
One way is to overcome your fears easier. If you are afraid of something figure out what makes you afraid of it and face that. Lets say someone is afraid to swim because they almost drowned when they were younger. They could swim in a safe environment numerous times and lessen the fear of drowning.
Another way is to condition body movements. Such as conditioning yourself to melee in Call of Duty. After getting killed repeatedly by another players melee you would learn that you need to press melee faster. So after time and trial you would be able to melee as soon as an enemy pops out in range.