If you enjoyed the book Mind Performance Hacks, you will most likely enjoy the article 22 Ways To Overclock Your Brain, from the self-improvement site Ririan Project.
There are several approaches recommended in the list of which you should be critical, most notably the Mozart Effect, but overall, the list is very good.
Among the most valuable pieces of advice would have to be #22:
Surround yourself with inspiring people from a wide variety of fields who encourage you and stimulate your creativity. Read magazines from a wide variety of fields. Make connections between people, places and things, to discover new opportunities, and to find solutions to your problems.Read the whole thing, including my new favorite quote that opens the article.