You write the bet down instead of trusting your memory
You leave the pub, open Betgistro and twenty seconds later it is on the record: start typing the team, pick the match from the list and the event and date fill themselves in; you add bookmaker, stake and odds.
When the match ends its final score shows up on the bet and, if you said what you bet on —winner, over or under, both teams to score—, Betgistro tells you whether you won or lost. With the Premium plan it settles itself, and the potential return, the money at risk and the balance are recalculated without you lifting a finger.
It makes no difference whether you play at Bet365, at Winamax or at both: every bookmaker you use fits into the same list, month by month.