I would certainly get back into business. Business offers the chance to determine what you do and how you do it to an extent unmatched by other careers. Between school and university I went into the army, after which I joined the family firm. Second time round, I would still want a break between school and university, but I would choose a job abroad with the chance to master a language and to learn how to get the best out of a group.
I studied economics for three years at university, which gave me a disciplined approach to business problems. What you study, however, is less important than the depth in which you study it. I would not study business or management because ideally that should follow practical experience, not precede it.
This time, I would aim to spend more time studying and less on the river, though rowing sharpened the will to win, and is the embodiment of teamwork.
I would look in my first post for the opportunity to learn, aiming for a job in a high-tech field to understand what was shaping the future.
When I had learnt all I could there, I would take an MBA, probably on the Continent. After business school, I would look for a post in the financial sector to gain a practical understanding of financial systems and markets before quitting and either buying a small business or starting one up.
Why work for someone else? I would stay in the food industry and probably in chocolate, where I could use my name and take a free ride on years of family brand advertising!
Sir Adrian Cadbury was chairman of Cadbury-Schweppes 1975-89.