Osho talks about active Meditations:
"People come to me and they say, ‘We have insomnia, we cannot sleep, so tell us some way to relax’ – they are Aristotelian. I tell them, ‘There is no need for you to relax. Just go for a walk, a long walk, run madly – two hours in the morning, two in the evening, and then rest will follow automatically. It always follows! You don′t need techniques of relaxation; you need techniques of active meditation, not relaxation."
Osho, The Hidden Harmony, Chapter #1