For what little its worth.
When I was going through school I was taught very much that you should have a career path identified and that you should plan your education accordingly. The insinuation was, from quite a young age, that you should be making life decisions at 14 or 15. This was true of both my teachers (who I respected greatly), my school, and to a degree my parents as well.
Its only with hindsight that I can see the absolute lunacy of such a philosophy.
At about that age, I was developing an interest in computers. They were just starting to take off as a home appliance, the internet was growing (I had been fascinated by Peter Snow on Tomorrow's World talking about the "Information Super Highway" and shopping from your living room), and I thought it would be a great thing to be part of. As such, I took GCSE IT (alongside History and Geography among other things as childhood-born interests), got good grades, and then went onto College. Here, believing that I was training for my future, I took a GNVQ in IT and, after discussing potential complimentary options with various people, settled on A-Level Physics. I was roundly considered to be an "intelligent lad", and it was the 'smart' thing to do.
The problem was, and I don't think I'll ever understand why I was talked into it, I hated Physics. That got dropped within six months. Luckily, the rules at the time allowed me to continue my GNVQ and still be counted as being in full time education. I finished up my GNVQ with a decent passing mark, but by the end, I pretty much knew that IT wasn't what I wanted to pursue as a career.
Consequently, jaded and uninspired by the education system and feeling a bit lost, I opted not to go to University - the one thing everyone always thought I was destined to do. I started work full time in the shop I had been a part-timer in through College, and bereft of any inspiration of what to do with my life, stuck it out there for the next ten years.
I've made the most of the situation in so far as a decade of retail has given a lot of skills and developed me as a person. I've had a 'career' in terms of promotions into store management and such, I have learned to like, even love to a degree, the retail sector. I love serving customers and have discovered I possess a reasonable knack from training and coaching people. Is it my life's calling? If it is, at 30, I don't yet feel it.
If I had the chance, every day of the week I'd go back and study History or Geography or Philosophy at College as these are the things that have one thing in common; I enjoy them now as much as I did growing up. I never had an intention to go out and be a teacher at 14, so these options didn't seem practical at the time, but I'm sure after two years of studying something that I actually had a proper passion for, I would have decided to go on to University and done more of something. I don't know what, but I'm confident I wouldn't have had the "education blows" mentality I did when I left college. From there, who knows? Maybe I would have found another outlet for my education past the narrow options I could see at 16?
As an aside, this "chose your path" philosophy applied equally to myself and my sister's year group, two above me. A while back, whilst having one of those family chats about nothing, we actually audited the fates of those we knew through still being in contact with, friends-of-friends, parents still bump into parents, or what have you. From a test group of about 20-30 we could compile between my sister and myself, some had gone on to great careers, some were just bumbling along doing not a lot, but a grand total of just one was doing what she had set out at do at 16.
And she had wanted to do that what shes does now since before anyone can remember.
I don't pretend to offer advise, but that's my own personal hindsight. If I could go back and study what I actually wanted to study, and not what I thought I should study, I would in a heartbeat.