Knowing when to pause or stop usually occurs when we won or when we busted our balances because continuing can make us lose what we won and we can lose more further if ever we already lose earlier. We need to wait a day or two before we can bet again so that we are sure that our luck is on a full bar again.
And yes, we have to know when to stop to avoid a big loss so that it doesn't cost us big money. And the last thing is to rest, like you said to reduce the tension after that bet so we can analyze well for the next match.
You can analyze the game and expect that your prediction was right, but the assurance, no one can tell unless you are betting with fixed matches, which is another topic to discuss, but with fair games, the outcome can be conclude after the game.