Various things, ranging from Traditional Kempo, full contact Open Martial Arts (before UFC was popular), Philippino Stick and Knife fighting, Muai Thai and later Kick Boxing as well as Women's Self defence clinics. Held Instructor/ Coach certification for all of the above as well as being a qualified national referee, and won Martial Arts coach of the year award back in the early 90's as voted and published in the Blitz Australasian Martial Arts Magazine back in the day.
There is probably more, dabbled in Brazilian Jiujitsu, traditional weapons, Kendo, Judo as well as travelling to the US to train with the now late Ed Parker, Bill Wallace and Benny the Jet Urquidez, and spending time in Thailand to learn Muai Thai at the source.