One of my favorite systems that I use in my business is Airtable. How do I describe Airtable? It's like Google Sheets and Microsoft Excel on Steroids!
Airtable provides its users with the ability to organize anything into a flexible spreadsheet for yourself or your team.
You can use Airtable to organize volunteers assignments, use it as contact management system to track your leads, manage projects, and create a content calendar schedule.
I use airtable for two reasons: to plan content and to keep track of content posted.
Here's a video of how I keep track of historical content I posted online: