Daunt, I am REALLY GOOD at zoning out. Fortunately, my hubby about lets me do what I want as long as it LOOKS spiritual. A blank notebook and pen/pencil are essential. Sorry, dude, that your mom caught on to your personal note-taking. Hubby got suspicious once when he noticed I was writing down the full names of all the speakers. One trick is to have the "approved" note taking up front (listing all the scriptures as said is good, mommy might enjoy looking over if she missed it) and writing your own stuff in the back. Or two exchangeable notebooks. Rip the back pages out if she goes snooping.
I only stay awake for one or two talks. I look over the program and I can usually spot the Christendom-bash and the anti-apostate speech. I listen real good during those and try and copy as many outrageous comments, verbatim, as I can. I've been complimented on my excellent note-taking by JW's. Later on, in private, I annotate with my own thoughts.
My PDA comes in handy, too. It is fully loaded with a bible to show off to any snoops, but of course it has many other features.
Good fortune to you, Daunt.