I like to include a little of what we learned...kind of breifly reviewing how the information we learned applies to us, in my prayers...if I can. It doesn't have to be in great detail, just mention it, because then you acknowledge the spiritual food Jehovah provides...but I think this way shows more appreciation than just saying, "thanks for the spiritual food you provided."
DOH!!! How did I miss that???
it's not a biggie, Dave. :)