Only thing which teaches you real things is ‘Experience’. All other theory and ‘how to’ guides are bogus.
Having said that, I reiterate that key to wisdom is always in books and experience of others who are more knowledgeable than you.
- In fact every one in this world has wisdom of life time, things which he learnt in his whole life. Get those nuggets from people, one lesson of their life and you will be a lifetime ahead of others.
- Think over it. This is the only secret of success.
Learn from everybody and everything. Be a good listener and student.