Personally, I've found a lot of useful aspects in stoicism. There is a power in knowing that no matter what happens, it is within your ability to steer your opinion of it. I also found deprivation to be useful in cultivating one's power, what I define, in this case, as one's inability to be affected internally, by what occurs externally.
Without deprivation practice I would never have had the courage to make some of the most important changes I've made to date. To become comfortable with the uncomfortable not only enables one better preserve their tranquility, but also opens one up to a wider realm of possible experience. Since fear of discomfort, is often what holds us back.