Flights, especially ones that cross entire oceans, allow me to catch up on reading and a short little guide I read was Dennis Magan's new book "Best Supplements for Men's Health, Strength and Virility."
Even though it did not really knock off a lot of hours on my flight, it was an EXCELLENTLY written book that was succinct, practical and very helpful. Like "30 Days of Discipline" it re-kicked my ass into not just eating right, but cut through all the BS about supplements, vitamins, pills etc. It also explained (without going into great detail) so the average man can understand why he should take certain supplements, why they have a positive effect, and the simplified biological processes that were involved.
Even if you didn't want to read all the details, the book still serves as a very simplified "instruction manual" or "vitamin list" where you could just take the supplements listed at the beginning of each chapter, go to the pharmacy and be done with this aspect of your diet in under 10 minutes.
It is only available in Kindle (I believe) for the low and affordable price of $2.99. You will likely spend more money on a single bottle of vitamins than this book.