Do something small today to make your future-self a better person. Developing your character hinges on your decisions in how and when you take actions. Small acts over time will snowball into (hopefully) something greater than you could have anticipated when you started today.
This isn't a new concept, it has just been on my mind today. Sometimes, I'm much better at writing this advice than taking my own advice, but sharing what is on my mind here is my 'small act'.