I guess there's a process of elimination to go through.
What are you good at?
What are your interests?
Do you want to be your own boss or work in an existing structure?
Do you want to be desk bound or do you need to get out a bit?
Do you need time out to retrain or capital to set yourself up?
From there you'll begin a process of elimination.
One of my happiest buddies is a window cleaner. By window cleaner, I mean he's his own boss, fit as a fiddle, working local and picking up his kids from school most days, currently driving around in a new VW California.
Other friends work for high flying Project Management companies in London, earn a fortune, work 12 hour days most days and hate themselves.