If you want a real change - search for something called Inner Engineering. For 2 years since I've done it, I never had a single bad day. Apart from it bliss and extasy became real experiences I now get once in a while.
Looking into it, it may seem wonky (it does to me). A friend of mine, very pragmatic and Cartesian enough gave it a shot and told me the same thing about how his life was transformed. Maybe I should look into it more closely.
It's ok, you can look at it this way: the worst case is you will waste some money and a couple days. On the other hand the best case is your life can be transformed in ways you can not imagine. You can listen to as many opinions as you want, you will really know only if you try it.
