"If you are not having fun, you are not learning." That was my motto when teaching database theory and administration. One day a student surprised me. He was quoting back me my own motto!
Meditation is one of the best ways to unlearn, to break out of old habits, to let go of the past and be more present to what is here now.
Humans are born learners – in youth often experiencing a certain ecstasy in learning itself. To stay young keep learning something new. Open up a different kind of magazine. Keep changing the environment that you're looking at so that your mind works at mastering new vistas. You're old when you can't be bothered to learn new things. A long time ago my first child told me, “When you stop learning you die.” I think he was eight or seven years old at the time.
Learn to unlearn. Question authority as it presents itself in books, all the media, and interpersonal relationships. Learning to unlearn is one of the greatest attainments in our lives; unlearning opens up space for new knowledge, skills, and insights.