Careers for the global nomad

I have a friend's 17 year old daughter staying with me at the moment. She's in London to attend interviews at universities she's applied to. We got talking about whether a 17-year-old really knows what she wants to do. I mean most teenagers might think it would be great to be a doctor or lawyer or dentist but have no real world information on what the job is actually like. It got me thinking about my own career and the careers of people around me.... ones I know personally and others (the more famous types) who are always the news. It got me wondering how all of us got to where we are.

I pretty much fell into my careers (I've had a few). I started modelling because my mother thought it would be a good idea to boost my self confidence. That lead to a TV career. At the same time, I was studying for an Information Systems degree (which I didn't finish) that lead me to a career in Marketing. I've worked in the IT industry (putting together marketing plans, writing press releases, organizing road shows and all that fun stuff), publishing industry (writing articles, interviewing powers-that-be, etc), PR and advertising industry (writing more press releases and organizing press conferences, etc) and finally in fashion retail (putting together more marketing plans, fashion buying and brand management). Of all the jobs I've had the last one in Fashion Retail was the most exciting (modelling and TV presenting is fun for a while but it soon gets to be incredibly boring). Unfortunately 'life' took over and I had to quit to follow my husband's career.... I studied for a bit, finishing the degree I didn't manage to complete the first time round. So here I am, a graduate and a global nomad, wondering what to do next. Granted most women don't share my lifestyle but as you can imagine I'm surrounded by women in similar positions. Ex-lawyers/investment bankers/accountants who've given up their careers for their husbands. Don't get me wrong a lot of these women (myself included) don't regret their decisions but it leaves me wondering what I can do considering my circumstances. Searching for a new job every couple of years (that's how often I move) is not appealing - by the time you send out your CV, interview, get a job and settle into it; it's about time to move again. So what do you do?