What are your best ideas for launch day activities that drive best results?

I saw few interesting launch activities around here lately and I wonder if you can share what worked best for you. Some of my favourites: 👉 online launch event on gather.town 👉 offline event for friends and supporters 👉 streaming launch day activities on YT 👉 giveaway for people from community reviewing product 👉 special discount for the launch day What else you can think of / tried and what works best?