Not only will you find the answers you're looking for quickly but that info will be tied to other info too and new questions may pop up or you'll be guided to related information by your nonconscious mind. NLP takes the concept of questions very seriously. It's almost the most important thing you can ever do when studying something. I think it was Einstein who said if he had 1 hour to solve a problem, he would take 55min formulating the RIGHT question and only 5 minutes working on the solution. Like in my memory post below, I had a question, I asked it AND WITHIN THE QUESTION ITSELF was the answer I needed and I didn't even realize it until a day or two had past. My question was SO unclear that Paul missunderstood it, but I did and after a day or so of reflection I'm like, "Duh. There it is."
Vague questions are fine because maybe you just want an overview of a topic. If you want to get more specific- then just ask more specific questions. If you can't think of any questions just start jogging your memory with a postview and get a mind map started.