The greatest gift you can give yourself is the development of your own character.   Think: “Do not conform any longer to the pattern of this world, but be transformed by the renewing of your mind” (Romans 12:2).    You may or may not have a New Year’s resolution for 2020, but they typically rely on willpower. And willpower is like a battery with limited energy—it wears out and needs frequent recharging. That’s why resolutions so often fail.    But if we use our willpower to develop simple habits that we do every day, the habits pave the way to…