It's becomes easy, really. Try to bear with my wordy explanation.
First, remember to write down all the trigger words you see which seem important in all of the chapter titles, bold print, italicized words, etc, during your 8-minute Preview. Make sure to leaf through the whole book physically cover-to-cover. Looking at the index or table of contents only doesn't stimulate all of your spacial & bodily kinestetic intelligences. At the end of 8 minutes, you have a list of trigger word "candidates" for step 4.
Then, when you begin to Activate, start crafting those questions by reviewing your list of trigger words and and getting curious about what the words mean, how they are all related, how those words summarize what an entire chapter is about, how they are important, how they summarizes specific viewpoints, concepts, meaning, etc. Plug the trigger words into your questions. Then, as you are SuperReading & Dipping, your inner mind begins guiding you to the pages which contain the answers for those questions.
So, after that first and second 30-minute activation session, you can begin branching the chapter-title trigger words on your Mind Map. And you'll continue selecting and adding key trigger words to your Mind Map after each pass.
In time, you'll notice the difference between "structure probing questions" and "detail probing questions." You'll see a generic type of format when you activate more and more books. The Purpose/Outcome statements can change with each book, but the approach you make when you begin activating with the Mind Probing questions stays pretty much the same, just plugging in different key/trigger words and arranging them on your Mind Maps.
And once you get comfortable with it, you'll begin to set your intention to automatically understand the key words while activating.
All of this awaits you while mastering the basics. 
