I was pleasantly surprised to hear my pastor preach on this topic.
Basically, as Christians we are followers/slaves of Christ, and we are to do what the Father and Christ have called us to do. Jesus present numerous parables (like the parable of the talents/minas) on how we are to go about His Father’s business. Paul reiterates that with doing all that we do for Christ.
One of his examples was if someone let you stay at their vacation house, you would take good care of it because it’s not really yours. You’d make sure not to trash it or leave it messy, but clean up after yourself. But we let our own homes, jobs, and lives get messy.
He advocated for a well kept home, excellent in the job (even if we have terrible or frustrating bosses), in health (weight loss if obese although not so much emphasis on regular healthy eating and exercises), and things like these.
Obviously, if you want to be married or are married, excellence as the head of the marriage and fulfilling God’s marital roles and responsibilities is another to add to good stewardship. Focus on pleasing God in all that you do by being excellent in all things.
I’ve found it amazing that my mentality has changed significantly by starting to do this when single, and it’s served me well in my marriage so far. Women really do admire excellence, which makes it easier to exert a godly influence on them.