“And Samuel said to the people, “Do not be afraid; you have done all this evil. Yet do not turn aside from following the Lord, but serve the Lord with all your heart. And do not turn aside after empty things that cannot profit or deliver, for they are empty. ” (1 Samuel 12:20–21, ESV)
How often do we turn aside after "empty things?" Empty things can be characterized as anything in this world that does not have eternal significance. The King James bible calls them "vain things." John Gill interprets this to mean "idols." I believe that is a very good interpretation. For an "idol" in this world is anything that would be the focus of your devoted attention, other than God Himself.
I constantly must teach my children not to dwell on "empty things." We must be discussing things that matter. There are some people with whom I can only discuss "empty things" because discussion of deeper things either offends or bores them. Though you are certain to interact with people like this frequently, make a concerted effort to be in the presence of those who are serving the Lord, rather than the empty things of the world.
It is a time for introspection. Are you more likely to bring up topics of sports teams, interior design, movies, clothes, or a thousand other meaningless things? Or are you wont to discuss the things of God, expressing your love and devotion to your creator? I've heard it said that you should never discuss "politics and religion." Whoever said that is a mouthpiece of satan. It is his design to keep you focused on anything but the Lord.
Our time is so short. Make profitable use of the time you do have by devoting yourself to Christ Jesus' service.