[gexla]

It doesn't. Nothing does. Good poker players should have no problem doing all this in their heads. The tooling which does help is hand analysis and replay. I haven't kept up, but there used to be tools while playing online poker which would track your play and the play of your opponents. Then I believe there were databases where you could upload that information so that you could study the play of regular opponents. Most helpful was looking at your own play though.