25. What is the best way to thank your GM?
The best way is to say, "Thank you."
For GM's Day or birthdays, gift cards are fine gifts that I guarantee will reap benefits for the entire gaming group (especially gift cards for Lulu, OneBookShelf, Wayne's Books, Noble Knight Games, Half Price Books, Barnes & Noble, eBay, Michaels, Staples, or Office Max).
[For more information on #RPGaDAY (or #RPGaDAY2017 specifically), read this.]