Change every sound in the server to something said by Rick Moranis. Reset factions to the old one and rename the current one, "OP Factions". Revert OITC to its older form, and include better maps for it.
I'd promote a lot more people. I'd unban a few people. I'd also host events so that the community would become closer in a whole. I'd also demote a few people (not completely) from their current ranks. I'd add Prison, SkyWars, and bring the old factions back. I'd accept a ton more suggestions. I'd reset Peaceful Survival and get it a new spawn. I'd remove CraftRoulette. I'd bring back the old SG lobby, not the system, just the lobby. I'd add more slots for TeamSpeak.
Promotions Add Prison Fix Factions New Creative spawn New Minefighter lobby New Herobrine's Chamber lobby Add ability for people to change name and birthday on profile as they please, but with a cooldown. (forums) Enlist help from entire staff team to help with these changes.
All that in just 24 hours? good luck. I'd probably not even know I was owner untill the 24 hours was over, because I'm dumb like that
I would promote MappyTurtle to Co-Owner. Or, just before the 24 hours are up, I would give MappyTurtle ownership.