Forbes entrepreneur blogger Eric Schiffer writes about breaking free of obsessions to reach goals, here.
Obsessing focuses not on what you are doing or even what you want, but on ill-timed imperatives. To set a summit goal then obsess on each stepping stone will tire out the best of ascendants, leaving them on the mountain in the dark, taking forever.
Focus and obsession aren’t the same thing. Focus sees something as it really is in its context. Obsession loses track of what something actually is in favor of processing it, and fears that if it isn’t done now, the sky will fall. Too much tension blows energy, forgets priorities, and trends in error.
A good way to memorize this principle is by singing to yourself the following 38 Special song, or at least the lyrics:
Fitness that adapts stays with you.