Great suggestions here, but one thing I would like to point out to the original poster is that, while I have read a lot of books, people have had a far greater impact on my thinking than any books. So I don't discount books, but it you want to be a better thinking look around for successful people and pay attention to how they work.
Thank you for your tip. I don't often run into successful people and the few that I do run into it's pretty difficult to have deep conversations. However, I have found people are a lot more open to divulging their inner workings on podcasts. So, I think podcasts are pretty adept at discovering successful people and their strategies.
