I love Richard Bolles’ path to mission in life from his book:  “What Color is Your Parachute?”  He describes a 3-step process on page 271 of the 2014 edition:

1. “to seek to stand hour by hour in the conscious presence of God, the One from whom your mission is derived“:  I’m not a religious person, but I do believe in a universal consciousness, so this works for me.  What a wonderful goal – to seek out one’s version of our creator / source, and to connect with that source.
2. “to do what you can, moment by moment, day by day, step by step, to make this world a better place, following the leading and guidance of God’s Spirit within you and around you“:  Since reading this, I’ve made it my intention to remember to act this way as much as I can through the day.  I’m not perfect, believe me, and I fail at this more than I succeed, but the intention is clear, and it helps me to feel better about my Hero’s Quest.
3. “to exercise the Talent that you particularly came to Earth to use–your greatest gift, which you most delight to use …“:  I’m intrigued by the path Bolles lays out here, and which I feel makes sense for me.

Connect to your source, do good deeds, and do what you love to do most to make the world a better place.  Wonderful!