For each project I have a trello board.<p>So 3 main lists. Backlog, Doing, Done.<p>The done part is by month so each month I create an new done list i.e. January 2018 - Done<p>I can then easily switch between boards.
I use another web app I created called MyPost ( <a href="https://mypost.io" rel="nofollow">https://mypost.io</a> ) which allows you to create posts using HTML, CSS, and a ton of font icons. So I'm able to keep track or write notes to myself about projects I am brainstorming, create, etc. I can also share the post with others and have them edit for those projects where I might be working with someone else.
I liked that post by Adrien (a frenchman who is focused on productivity and organisation), lots of great insights in it! <a href="https://byrslf.co/work-on-12-projects-without-burning-out-f5bec50dafdb" rel="nofollow">https://byrslf.co/work-on-12-projects-without-burning-out-f5...</a>
I use <a href="http://zenkit.com" rel="nofollow">http://zenkit.com</a>. With Zenkit it´s easy to create Kanban Boards and Mind-Maps for different projects. Also, it comes in really handy that the views can be switched between and worked on. Also has delegation features.