What are (some) good ways of managing ToDos?

Long time ago, when my mind felt overwhelmed with stuff I need to do, my first thought was: I need to start writing it down. And so began my journey through various tools, methods, apps, pieces of paper, post-it notes, and while it was sometimes quite chaotic (often I've used several methods at the same time - whatever medium was closest to me when I decided to write someting down) it all, I got the benefit of getting rid of memory overhead, where I had to use energy to make sure I don't forget anything. And, as I've learned fairly recently, this principle is one of the basis for Getting Things Done.

Thinking about it now, the single most important thing for me was to actually use the tools I had at hand (what good are they if you ain't using them!). Also - treat the time spent on managing your todos (of course to some extent, but leave that for later) as an investment rather than a waste of time.

But now - to the core of the topic; while managing anything at all is a good start, it is even better to manage your matters well - and as we've named everything, here are some links, names, and methods to help you choose (or whip up!) something for yourself (yeah, mixes work well too)!

Standard To-Do list

This might be a good starting point, as it's as simple as it gets - simply write your tasks down ona a piece of paper, notebook, app, a blackboard, or whatever you have at hand, and cross it away or tick it when done! Remember though, that's just the start - at least I suggest incorporating some important points from other methods that I'll describe later.

So, while this method works both with digital and analog mediums, I have two app suggestions (but keep in ming that any notepad will do):

Google Keep

I believe this is the simplest option to set up, which has an app and a web interface, and good synchronization between devices. It's checklists and notes are quite convenient, but one big caveat is that it's very hard (if not impossible) to export your notes to a file.

Joplin

Joplin is anice note-taking app, it may not be the most convenient thing around, but it definetely gets the job done. It can be synchronized between devices, has no problem exporting your notes, and supports Markdown!

Autofocus method

Autofocus method is an amazing method of flowing through your tasks - priorities are dynamic and set by yourself, and it acknowledges that some tasks will never be done. I've fount this acknowledgement very important, because things you'll never do can heavily clutter your mind.

While this method will work with digital notepads, I think it's best suited for paper.

Bullet journal

Bullet journal, while the most sophisticated out of all the methods in this piece, is still very extensible and customizable.

It is based on several concepts such as the Index, Collections, and Monthly Log, but also on Migration (that's a similarity with the Autofocus method) and Threading.