icompetetowin

I've been playing action-oriented games (diablo 2, cod2, l4d2) for the longest time and would like to try out some strategy-oriented games.

I'm currently working on decisionschool.org, something that I wanted for myself for a long time but couldn't find, a learning platform for decision-making/rationality.

I managed to create some exercises (multiple choice questions) with the help of friends and online resources. But coming up with practical exercises is still a challenge.

My question to HN is two-fold:

Is it possible to practice decision-making?

And if it is, which ways do you use or have seen?