What mental skills or functions would you say are important in poker?

[rainonacongadrum]

What mental skills or functions would you say are important in poker?

Below is a list of what I've come up with so far. Please add on. Also, please list what you believe to be the most important mental skill(s)/function(s). I'm looking to improve in every category.

In order from most to least important:

1. Focus
2. Remaining calm (so tilt doesn't set in)
3. Ability to think fast and respond quickly
4. Memory