I used to use [a Windows 3.1 shrink-wrapped software package] that offered notepads and appointment calendars. Then I switched to Linux. That was 16 years ago. To take the place of the Windows application, I had to write my own list-maker from scratch. Today, there's a new python3-pyqt5 version (under GNU General Public License) of my script for Linux and Windows desktops to help maintain the equivalent of index-card files. Obviously this is not something you'd use just to be like everybody else. I use it because I don't really know how others handle their everyday lists and I can't think of an easier way. If you, too, suspect it ought to be easier than it is, it may be. Please look at Tonto2. Thanks.