Do what you know. Get as much education as you possible can.
Train yourself in a field where you use your mind (IT, lawyer etc) and not something where your job depends on physical abilities (mechanic, cop etc.)
It also helps to have specific skill sets, so you can tell a prospective employer exactly what you CAN do. It occurs to me that there will always be a need for people working in criminal justice, the law etc, but automotive technology may change rapidly your skills may become obsolete.