Reading is one of the most underrated things to do.
I've recently looked into it. I'm pretty sure every single person I admire and want to be like considers themselves a book worm. These are high performing people. People who achieve a lot more in 4 weeks than your average Joe. The easiest way to improve yourself is to emulate what works for others. So, if the people I admire read on a regular basis, you're damn sure I am going to do the same.
Current reading list:
Money, Master the Game - Tony Robbins
Sabriel, Old Kingdom Book 1 - Garth Nix
The Richest Man in Babylon - George S. Clason
Four Hour Work Week - Tim Ferris
The Name of The Wind - Patrick Rothfuss
The Vegetarian - Han Kang