Ground
Everything on the other pages here is arithmetic about things you do not control. This is the one page about the part you do.
A bad beat costs you the pot, and the pot is the small number. Say it takes two hours to come back to yourself, and over those two hours you play three big blinds an hour worse than usual: wider preflop, one more thin call, one bluff at somebody who was never folding.
That is six big blinds, on top of the pot, off a hand that was already decided. Do it twice a month and you have given back the win rate the bankroll math was counting on, and the band will not show it to you as a leak, because it looks exactly like variance from the outside.
This is the asymmetry worth sitting with. Variance is large, unavoidable and eventually neutral. Tilt is smaller, avoidable and never neutral. Almost all the attention goes to the first one.
Tilt gets discussed as a character failing, which is both unkind and useless. What it is closer to is a physiological state: a stress response, with a heart rate and a breathing pattern and a narrowed attention, that arrived before you had an opinion about it.
That matters for one practical reason. You cannot reason your way out of a state you did not reason your way into. Telling yourself the call was correct does not work, because the part of you that needs convincing is not listening to arguments. What does work is changing the state directly, and the state has physical inputs.
And the one that is not a technique: notice it earlier. Almost nobody catches tilt at the start, because at the start it does not feel like tilt. It feels like clarity, and a sudden certainty about what somebody else has.
Short guided sessions written for poker players rather than adapted from something else: before you sit down, between the hands, and after the last one. The at-the-table resets are free, permanently, because the moment you need one is not the moment to be asked for a card.