How do you cope with losing in a game?

Generally, when you lose but feel like you played well, you feel satisfied. When you lose due to bad luck, it's a bit disappointing, but it's not worth getting upset about. However, if you decide to play against the computer and make a big mistake, and then have to start all over again, that's really frustrating. It's simply not interesting to play a second time – the computer isn't a person; it will use the same strategy.