Plato said that the start of any learning is the most important part of it. This book opened my mind and led me to read the following:
Nietzsche, Wilhelm Reich, Che Guvara, Robert Pirsig, Sartre, Aleister Crowley, The Sirius Mystery, Sufism, Sogyal Rinpoche, The Dalai Lama and many many more.
Cosmic Trigger is well worth a read. You might not agree with it all, but some of it is very switched on.
I liked that he suggested to read an entire periodical once a month, completely outside of your own sphere of knowledge or interests - to enable you to start to see the world from a different perspective.
I also liked his little exercise -"Try and spend an hour without using 'I' in your conversation, then try a day, and then a week and then a month". Again, it is about shifting one's perspective.