I think it's also flawed when applied to "anything". Realistically, you can only become "best" at a handful of things, even under relaxed scope. You cannot be b

I think it's also flawed when applied to "anything". Realistically, you can only become "best" at a handful of things, even under relaxed scope. You cannot be best at all skills you require to function. However, it often suffices to be reasonably good. Be reasonably good at cleaning. Be reasonably good at cooking, or accounting, or programming, or exercising. Then take these things off your mind, and divert your attention to those skills that comprise your focus.