Some research and expert guidance you might find useful:
1. Frank Martela and Michael F Steger. The three meanings of meaning in life: Distinguishing coherence, purpose, and significance. The Journal of Positive Psychology, 11(5):531–545, 2016. doi:10.1080/17439760.2015.1137623.
2. Roy F Baumeister. Meanings of life. Guilford Press, 1991.
3. Viktor E Frankl. Man’s search for meaning. Simon and Schuster, 1985.
4. Roy F Baumeister, Kathleen D Vohs, Jennifer L Aaker, and Emily N Garbinsky. Some key differences between a happy life and a meaningful life. The journal of positive psychology, 8(6): 505–516, 2013. doi:10.1080/17439760.2013.830764.
5. Crystal L Park and Login S George. Assessing meaning and meaning making in the context of stressful life events: Measurement tools and approaches. The Journal of Positive Psychology, 8 (6):483–504, 2013.
6. Blake A Allan, Ryan D Duffy, and Richard Douglass. Meaning in life and work: A developmental perspective. The Journal of Positive Psychology, 10(4):323–331, 2015. doi:10.1080/17439760.2014.950180.
7. Samantha J Heintzelman and Laura A King. On knowing more than we can tell: Intuitive processes and the experience of meaning. The Journal of Positive Psychology, 8(6):471–482, 2013. doi:10.1080/17439760.2013.830758.
8. Michael F Steger. Experiencing meaning in life: Optimal functioning at the nexus of well-being, psychopathology, and spirituality. In The human quest for meaning, pages 211–230. Routledge, 2013.
9. Bryan J Dik, Ryan D Duffy, and Brandy M Eldridge. Calling and vocation in career counseling: Recommendations for promoting meaningful work. Professional Psychology: Research and Practice, 40 (6):625, 2009. doi:10.1037/a0015547.
10. Lindsay G Oades, Michael Steger, Antonelle Delle Fave, and Jonathan Passmore. The Wiley Blackwell handbook of the psychology of positivity and strengths-based approaches at work. John Wiley & Sons, 2017.
11. Michael F Steger and Bryan J Dik. If one is looking for meaning in life, does it help to find meaning in work? Applied Psychology: Health and Well-Being,
1(3):303–320, 2009. doi:10.1111/j.1758-0854.2009.01018.x.
12. Bryan J Dik and Ryan D Duffy. Make your job a calling: How the psychology of vocation can change your life at work. Templeton Foundation Press, 2012.
13. Login S George and Crystal L Park. Are meaning and purpose distinct? An examination of correlates and predictors. The Journal of Positive Psychology,
8(5):365–375, 2013. doi:10.1080/17439760.2013.805801.
1. Frank Martela and Michael F Steger. The three meanings of meaning in life: Distinguishing coherence, purpose, and significance. The Journal of Positive Psychology, 11(5):531–545, 2016. doi:10.1080/17439760.2015.1137623.
2. Roy F Baumeister. Meanings of life. Guilford Press, 1991.
3. Viktor E Frankl. Man’s search for meaning. Simon and Schuster, 1985.
4. Roy F Baumeister, Kathleen D Vohs, Jennifer L Aaker, and Emily N Garbinsky. Some key differences between a happy life and a meaningful life. The journal of positive psychology, 8(6): 505–516, 2013. doi:10.1080/17439760.2013.830764.
5. Crystal L Park and Login S George. Assessing meaning and meaning making in the context of stressful life events: Measurement tools and approaches. The Journal of Positive Psychology, 8 (6):483–504, 2013.
6. Blake A Allan, Ryan D Duffy, and Richard Douglass. Meaning in life and work: A developmental perspective. The Journal of Positive Psychology, 10(4):323–331, 2015. doi:10.1080/17439760.2014.950180.
7. Samantha J Heintzelman and Laura A King. On knowing more than we can tell: Intuitive processes and the experience of meaning. The Journal of Positive Psychology, 8(6):471–482, 2013. doi:10.1080/17439760.2013.830758.
8. Michael F Steger. Experiencing meaning in life: Optimal functioning at the nexus of well-being, psychopathology, and spirituality. In The human quest for meaning, pages 211–230. Routledge, 2013.
9. Bryan J Dik, Ryan D Duffy, and Brandy M Eldridge. Calling and vocation in career counseling: Recommendations for promoting meaningful work. Professional Psychology: Research and Practice, 40 (6):625, 2009. doi:10.1037/a0015547.
10. Lindsay G Oades, Michael Steger, Antonelle Delle Fave, and Jonathan Passmore. The Wiley Blackwell handbook of the psychology of positivity and strengths-based approaches at work. John Wiley & Sons, 2017.
11. Michael F Steger and Bryan J Dik. If one is looking for meaning in life, does it help to find meaning in work? Applied Psychology: Health and Well-Being, 1(3):303–320, 2009. doi:10.1111/j.1758-0854.2009.01018.x.
12. Bryan J Dik and Ryan D Duffy. Make your job a calling: How the psychology of vocation can change your life at work. Templeton Foundation Press, 2012.
13. Login S George and Crystal L Park. Are meaning and purpose distinct? An examination of correlates and predictors. The Journal of Positive Psychology, 8(5):365–375, 2013. doi:10.1080/17439760.2013.805801.