It turns out schizophrenia is triggered by a virus. To inoculate yourself you should go to the bus depot and start a conversation with the man wearing the most incoherent sandwich board. Bring the whole family. It will be like a chicken pox party for insanity. If all goes as planned, your mental immune system will be that much more resilient when you return home.
You may even learn a thing or two. Closely following illogical thought processes is like cerebral cardio for expanding neural connections and advanced yoga for limbering up creative thought.