Bold of any of them to assume I'll remember there was an "it" to remember in the first place. My best offer is a vague sense that I've forgotten something.
My memory sort of acts like a carousel/merry-go-round, in that I'll store a memory, I know it is there, but I cannot access it at will, and it will re-appear at a random time at some point in the future when doing something completely unrelated.
I’m so sick of my wife forgetting to do things (like take the medication that if she misses a dose it ruins her entire next day and sets off a ripple of migraines that can last a week) that I’ve just started stealing her phone to put in reminders.
If she has trouble remembering if she's taken the meds, I highly recommend TimerCaps. They are a pill bottle lid that tells you how long it's been since the bottle was opened.
We have several at my house-- I can check and see if my partner has drugged the dog or if I've taken my ADHD meds. My partner can also see if I've taken my meds.
I use discord, its free. Made a server with only myself. I have so many channels that are all lists of things, a foods-I-like channel is helpful for when I am hungry but don't remember what I like at the moment.
I have my own personal server as well. I send myself links all the time and it means I can upload 1 image and then just send the link around which is great for bad internet
"I'll remember", I say, not because I'll remember, but because any form of writing it down I will inevitably forget as well. I'm just trying to save myself pointless work, here.
Nothing is more frustrating than knowing you were supposed to write something down, then not remembering what that something was. Yet for some stupid reason you can remember you were going to write whatever it was down.
For me, a proper reminder needs to have a property like physically preventing progress until I take care of the thing, or jumping up and demanding my attention until I take care of the thing.
The most basic form is that if I need to do something tomorrow at noon, I don’t create a reminder. I create an alarm! And if the alarm goes off and the thing is not done, I snooze it instead of stop it.
I have a whiteboard on my desk. It's the only effective "to do" list I've found, for me. It's covered in chicken scratching. I erase stuff as I do them.
Some external habits work for me, like setting an alarm that reminds of something; this only works well with repeating stuff or when I'm not stressed when I set the alarm.
I've found that using a calendar app with reminders can be a great help for me. Personally I use Fossify Calendar (formerly Simple Calendar) to create reminders for myself for hours/days/months in advance. I'll never forget to do the laundry again....at least until I somehow lose access to my phone.