I've had to specifically put a hard stop on my usual thought process while playing games, in an effort to get back to how I played as a kid. If I catch myself strategizing too much to the point where I'm not even playing anymore, and am just going through the motions I already planned out, I purposefully make myself do something completely against the plan just to put myself in the kinds of situations I'd be in as a dumb kid who did the wrong thing, since that was the last time I had real fun playing games. It doesn't always work, but I do have more fun than I did earlier in my adult life.