What are your tips for a perfect launch?

Hey Guys, I'm a newbie on Product Hunt and I've already found so many attractive and interesting tools :) I'd like to launch our new open-source revolutionary library, but I want to make it the best way. Have read all Product Hunt Guide. Everything is already prepared, and I intend to launch on the 25 July (preparing our Discord community before the launch) Have you got some tips or piece of advice to give for the newbie that I am? Thanks in advance :)