Any time I have a work-related verbal discussion, I follow it up with an email that both explains what I took away from that discussion and describes any commitments I made.

I developed this habit decades ago, originally as a butt-covering exercise (having a written record of what I think was said can be very useful). However, the real value wasn't that at all -- instead, it was clarity. I can't even begin to count the number of times that a misunderstanding was discovered by doing this.

As a bonus, it helps me keep track of what I've promised to who.

Improve your memory if you don't want to write things down. Immediately draft emails for commitments you made.

I have a shortcut to email myself. I do it on the spot.

> These don't make it into any system I've tried

Put them into the systems you try.

I send them a chat message right then and there with the commitment I’m making as a shared TODO. I then have time blocked off to review from chats if there is anything I haven’t followed up on.