WRL I keep putting it off till I have the time. That doesn’t usually happen.
The best thing for a man to do is to be objective, critical and reflective. You will discover, to your amazement, that you never stop figuring out new stuff. You need to go beyond just being observant, you need to be analytical as well.
Do not allow someone else to tell you what to think, if you do you will just be another clone.
Perhaps others here could suggest some books to read about human nature. Books can be a source for reflection.