Do you have a mission-statement or life-long goal?

There are a lot of successful engineers/developers on this platform. (I understand success means different to different people. So it can be anything that you value). I always wonder how you guys are so focused (assuming that is the one of the main contributor to their success). I often find myself either getting side-tracked or going in completely new direction.

Do you have a mission-statement or a long-term goal that you are so passionate and dedicated to that always kept focused and on track? How did you came up with the goal?

And lastly any tips for me or really anyone reading this?

Thank you for your reply.