Online calendar with a widget on my phone’s homescreen that shows the upcoming week’s appointments, so that I constantly see them by accident. And a habit to always put important appointments in the calendar immediately when I’m made aware of them or plan them.
And always have the calendar open in a browser on the computer.
I think it might vary from person to person and over time. Coffee usually has no effect on me, unless I overdose and get all shaky and cold sweaty. But since a year ago I’ve been having a hard time sleeping if I drink it after 18:00. I used to be able to have a cup right before bed no problem but not any more.
So far only pretty obvious ones such as the correlation between depression and more time in bed/less working out/eating etc. But you never know what use you might have from logging things, for instance I went back to see if gluten affected my mood and energy levels, and even if I didn’t log gluten specifically I could sort of extract that info from my food logs and compare it to my logged perceived energy levels and mood (I found no correlation).
Calendar app synced to all devices, with a couple of different calendars in it for easy sorting. Task managing app. (I’m in the process of switching from Trello to Obsidian for tasks to try to incorporate them into the rest of my note taking activities. Oh also - an app for taking notes and writing things down)
Yes, I do that too. And if I have to prepare something before an appointment I might make preparation its own calendar event, with reminders.