Sayeth Master Yoda

This one's actually relevant for many of us. a reminder to stop obsessing about the future and worrying about tomorrow. Just focus on what you are doing now.

A Jedi must have the deepest commitment, the most serious mind. This one a long time have I watched. All his life has he looked away... to the future, to the horizon. Never his mind on where he was. Hmm? What he was doing. Hmph. Adventure. Heh. Excitement. Heh. A Jedi craves not these things.
— master yoda