Make a list of the things that have always interested you. Jot down whatever comes to mind, without regard for possible difficulties or limitations. Make out the list and then through a process of elimination, determine which thing or things appeal to you the most. This should clearly indicate what you should actually be doing. Don’t focus on the job at all, but rather on the activities and conditions you most like to surround yourself with. This will suggest the kind of work you should be doing. Now do it!