I use Things3 loosely, mainly for (reoccurring) reminders, also keep my shopping list and things like that in there. I also use it for work tasks, but not a lot, I don't like endless backlogs I will delete things that sit too long. I generally remember the important things.<p>I also use "remind me" in Slack a lot as most stuff arrives there. For me it's often just a case of "postpone till after I complete what I'm doing".<p>I use Google Calendar for appointments, birthdays etc, work wise I'm stuck with Outlook calendar, it's fine, works well to schedule meetings etc.
I'm still at the beginning of figuring this out for myself, but I am currently having some success just using Obsidian and markdown checklists. I make the list, and as I check off tasks I move them below the unfinished tasks.<p>I always tried to avoid the free-form, text based approach, but I have used a range of tools in the past and they never stuck, for one reason or another. The main ones probably being that they felt incomplete or caused additional stress responses.