Win a lot. I don't know that's what fun for me. I just focus a lot and don't really get mad or tilt unless we have like an afk or feeder. It just takes a lot of games to get focused and not really think in the back of your mind "WIN WIN WIN". Really you just have to focus on not feeding and how to focus objectives. Another thing is you have to learn when to accept defeat and be okay with it.
Even challengers surrender at a certain point in a game where it's literally impossible for a come back. Never surrendering is not always a good solution as it can make games just drag and cause your team to snowball even more making you waste valuable time and also making it more frustrating for the next game you play.