It is not what you do-it's who you are when you are doing it.
Find something and throw yourself at it with all your might.
Find the best part of you and apply it to your task at hand.
What you are doing today may not end up being what you stay with long term-but you will have learned how to live in your highest gear.
Then you can take that meta-skill into your next endeavor.
Even if you don't like your current job or body-give it your best.
Get really skilled at giving 100%
Then, a day may come when you have the opportunity to work at your dream job, start your own business, lose 50 pounds, or meet the person you have been waiting for so long.
Be up to speed.
Show up on fire where you are.