I use Git and a markdown file. I keep a repo on all my systems that track a Gitlab repo (any Git repo would work). This repo contains a primary ToDo file with

I use Git and a markdown file. I keep a repo on all my systems that track a Gitlab repo (any Git repo would work). This repo contains a primary ToDo file with an overall list. When necessary, I spawn dedicated lists for specific projects or events. This is all written in Markdown (usually Github flavored). The text editor is left to the reader's preference :) I'm strongly preferential of Vim, and use a few different Markdown plugins to ease writing. Occasionally, if needed I build a printable PDF using Pandoc. Usually I only do this when I need to bring it with me. Of course this doesn't bring any sort of notifications or reminders, so I supplement this with Google Calendar (and more recently Google Keep) when needed.