"Don’t Correct Your Mistakes – It takes a lot more work to rid yourself of bad habits than it does to avoid making them. It may ruin the fun, but consider reading FAQs straightaway, rather than finishing the game first." I have the exact opposite approach. You're bound to make mistakes, no matter what you do. But you can control how you process them. The way I play/practice is a game if I make a mistake, even if it works out for the better (i.e. throwing a frag grenade instead of flash), I go back to the last saved checkpoint. The way I see it: I will always be able to beat a video game (especially nowadays) either by luck, tenacity, or abusing my continues. But if I take out the luck (good and bad), and ignore the continues when I die/fail then I know that I'm good at the game -- not just capable of beating it.