Its very hard for me too, to not play emotionally. Playing within my bankrolls helps though
if i'm playing live, it's hard having to fold good cards and frustrating but 99% of the time it was correct and saved lots of money. online not so much, i've broken several things when dealt a bad beat
control of emotion should be in every hand and not only the strong ...
How to deal with your emotions at the poker table must know the unit! I think a lot depends on the experience, the more there are in extreme situations more you get used to them! And you can develop a strategy for behavior!Training and coaching at the tables, so my suggestion!
I would like to recommend you to read Jared Tendler's book.