I know what you're talking about, but it is a little hard to come up with the situation if it has already gone in one ear and out the other. Here is a better idea...
When you sit down to read your poker book, take notes on it. It helps tremendously. Sure, you might feel silly taking notes at first while your reading a book about cards, but it makes sense. Think about back when you were in school... you would read a book and take notes on the side, or have some sort of a printout, or highlighted things for going over later. Same thing here, you are trying to absorb the information, not just skim over it. And most people when they read, they will remember parts, but not the whole. You will probably remember the name of the concept or play, but will you remember what situations work for it? Or even how to implement it? I used to never take notes with poker books, and I must have read Harrington's books 3 times before I remembered all of the concepts(by the way, the 3rd time I took notes). Because I would forget about them a chapter afterward. Try it and see how much you improve!