Another great option to make the most of your time is to journal your thoughts, insights and lessons of life. Keep it with you and when an idea strikes you, write it down. You can revise from time to time what stuff you have noted down and this promotes self-growth.
While machines and technologies do most of the work for you, what I have been talking about to keep you busy helps you to remain human. You too need not become a robot. This is the boundary I meant at the beginning of this article.