Where is my treasure?

Yesterday I was studying Matthew 6:19-34 with a friend and then at the Christian union main meeting the talk was on Matthew 10:34-39.  Today I was preparing a Bible study for international students on Luke 12:13-21.  I'm spotting a theme:

What am I living my life for?

Where does my mind constantly return to?

Money? Work? Sport? Food? Sex?
 
Christ?

 ¹⁹ “Don’t store up treasures here on earth, where moths eat them and rust destroys them, and where thieves break in and steal. ²⁰Store your treasures in heaven, where moths and rust cannot destroy, and thieves do not break in and steal. ²¹ Wherever your treasure is, there the desires of your heart will also be.  Matthew 6:19-21.

 I might not feel that I'm building up a hoard of possessions but there are other ways I can store up wealth on earth.  There are all sorts of things I can strive for in life that won't matter in eternity.   Having a PhD in heaven won't matter.  The respect of my peers won't matter. Solving a Hilbert problem won't matter.  Having a comfortable life won't matter.  Pleasing friends and family won't matter.  Living for Christ: will matter.

³⁷ “Anyone who loves their father or mother more than me is not worthy of me; anyone who loves their son or daughter more than me is not worthy of me. ³⁸ Whoever does not take up their cross and follow me is not worthy of me. ³⁹ Whoever finds their life will lose it, and whoever loses their life for my sake will find it.  Matthew 10:37-39.

 Now how do I put this into practice?