Organizing anything for more than four people is a skill, and almost nobody is taught it. These are the things we keep learning the hard way while building planit: how to ask a question a group can actually answer, why a chat thread cannot close a decision, what a deadline needs in order to work, and how to chase people without becoming the person everyone mutes.
Everything here is written to be used. No tool required for any of it — where planit does something described below, it is because we wrote the guide first and the feature second.