The Occult, New Age stuff, all things normally condemned by Christians as evil, of the devil etc. Yes, a lot of it is, but where draw the line? If you are going to absolutely strict, then your Christmas tree has purely pagan roots, and so does your easter egg. Even our week-days are named after pagan gods. My point is that the line is drawn the moment the motivation is to either do evil or communicate with the spiritual realm outside of Christ. Those things are ultimately destructive. However, herbal tea to relax a stressed stomach, breathing techniques, certain types of meditation can be really helpful to improve health and mental stability. The ideal is really to become rooted and grounded in the Gospel truth, your identity in Christ by which you prove all things.