I have a small pocket size notebook with a few helpful things like blind progressions and odds. Are you allowed to bring this to the table and view it during a round?
This came up before. It was ruled that it was allowed, if you don't use it in the middle of a hand. I haven't heard if they changed it, since this article.
You may have notes etc. all you want, you just cannot refer to them while in a hand. So once your cards are dealt to you, put the notes away, play the hand and when you muck your hand you may pull the notes back out.