“You can’t help respecting anybody who can spell TUESDAY, even if he doesn’t spell it right; but spelling isn’t everything. There are days when spelling Tuesday simply doesn’t count.”
There are times when it's important to focus on the details, and times when it is important to see the big picture! If you're always focused on the details (see: how to spell Tuesday) then you're making a big mistake.
Relax sometimes, and focus on the positive things in your life without making mountains out of molehills in the details. Work towards your big picture, long term goals, and only focus on those details that deserve your attention!