For me: work, life, family, everything is built on these foundations (albeit imperfectly):
Q. 1. What is the chief end of man? A. Man’s chief end is to glorify God, and to enjoy him forever.
http://www.reformed.org/documents/WSC.html
He has told you, O man, what is good; and what does the Lord require of you but to do justice, and to love kindness, and to walk humbly with your God? (Micah 6:8 ESV)