I keep finding that the more complicated the setup I use for productivity, the less I go back to it whenever there is a hiccup. Simple methods survive long term. Currently my wife and I use a shared google doc, and while it is far from perfect, it ends up working well for us since it works on our phones and computers, is easy to bookmark, and the interface never changes.
* Now
* Today
* Next Week
* The future
Anything more complex is a waste of time as it assumes I can predict how and why I need to work on something.