Day 25 - What is the best way to thank your GM?
This one might seem like a no-brainer, but honesty, the best way to thank your GM is, at the end of the game session, just say "Thank you for running this game session" or some such, or even give the GM a positive comment about the game session just run.
That said, while thanks and praise are nice, I also accept diabetes-friendly food (snacks or otherwise). I suspect that if I said I wanted money, it would call into question my status as a hobbyist and amateur! :)