There is one item of my GTD system that I've always struggled with: what is the best place to keep my MPN's. I like to plan and keep notes and have an inventory of my past projects. I've been using Evernote to do that for years with relative consistency but recently I tried using Onenote and Word 365 (I have an Office 365 subscription). One thing that I like on my system is to have a link to the MPN on my tasks/projects manager app. I've had that with Todoist, and more recently with Nirvana HQ. The downside is that sometimes the links don't behave the same when I'm on my desktop or mobile: For some reason, links to a OneNote note never opens correctly on iOS, so I knew it would not work for me. Evernote works well on the iOS (if I use the html link on Nirvana). On my desktop, the link will open Evernote Web, which is not ideal for me (I still prefer Evenote desktop). If I use Office 365 I can use the online share link to add it to Nirvana, which opens the Word app on iOS and the Office web on my desktop, which is okay. What are your experiences with Master Project Notes? Am I complicating things? Does it matter where to keep them?