I start a 3 year stretch on the 17th of this month for defending myself on my own property against a drunk neighbour that was trying to tear my face apart fish hook style. 43 years of age and I've never had any previous trouble with the law before this nutter showed up in my life. The British justice system sucks. What in terms of Jiu-jitsu skills should I be working on during my incarceration? Sensible and humorous suggestions please.