Level up your retro's, team agreements, team forming, or any other session. Don't follow the pack - be the leader.
Something I've always done as an ATF is design my own team sessions - especially retro's - based around the teams needs. It wasn't until recently I realised this isn't what everyone does. I'm planning an interactive session where I can demonstrate and coach other's into designing more effective and engaging retro's etc.
(I realise you said 'no more retro stuff' in your submissions guideline - but hopefully this is more awesome and interesting than just talking about retros)
I've suggested Intermediate because I think it's better people have already facilitated retro's.