Brysing, I think it's a matter of UK vs. US uses of words. I have only ever seen the word "practise" in a British setting (in fact, my spell-checker thinks it's spelled incorrectly). In US grammar, "practice" is both a noun and a verb. In UK grammar, "practice" is a noun, while "practise" is a verb. :-)
To answer the original post, I practise (*smile*) a nature form of Witchcraft, tarot, a few other forms of divination, and meditation (mostly centered on Chakras). I'm studying herbalism, astrology, the Ogham, and a few other things that I can't think of right now as it is very late and I'm tired...