Truth be told, a person can learn new things from a single lecture or book each time he hears or reads it. Even on the fifth time around, there is still new information that can be picked up and learned.
Studies have shown that the average person only retains three concepts from any book that they read. That means that if you read a book with 30 chapters, you will only really retain 10% of the information, if that at all. If a person would read the book again, they would pick up and retain more concepts. It is sometimes beneficial to read books several times over to make sure that you gain the maximum amount from the book.
The average book has multiple chapters and the average chapter has multiple points and sub points. The unlucky person will read a book once and think that they absorbed the entire book. They would feel that reading the book over again is pointless.
The point I am making is not to read every book and go to every lecture multiple times. The point is that a lucky person understands this and knows how to maximize his time. If he feels that reading the book a second time, he will read it a second time. The unlucky person would not even consider it.
Part of being lucky is knowing how to maximize your time. Nobody has time to do everything; the trick is to learn how to do as much as possible. If your choice is to reread a book that has valuable information in it or watch a tv show, choosing the tv show would be the unlucky choice.