To never be bored, always have something to think deeply about.
To always have something to think deeply about, always be learning something new.
This is how author Louis L’Amour lived his life, particularly during his teens and twenties as he wandered around the world and educated himself by reading in the order of a 100 books a year.
As he wrote in Education of a Wandering Man:
The beauty of educating oneself as I was doing, or as anyone can do, is that there are no limits to what can be learned. All that is learned demands contemplation, and so one is never at a loss for something to do.
This is a cheap and effective antidote to boredom. One that will also strengthen the ability to focus so important to live an intentional life and to thrive in the knowledge economy.