Well I haven't PRed for profit, so my comments are speculation.
I'm assuming that the system works just fine for you when you are reading for your own interest.
I suspect that you are putting unnecessary pressure on yourself when you PR for profit. Much like students trying to learn and use the system for an exame.
I suspect that the common problem is poor purpose. Your motivation for extracting the information is not desire driven. To you, it's just something that has to be done to make money. The trick is to make is something you actually want. Consider what you would be like if you possessed the information in the reading. How would it change your life? What would you do differently? What benefits would materialize for you?
Oh, I'm also assuming you're not a proof reader. 
Good luck, and sending love,
Iam2 
