I remember to remind myself, but then I forget to do the thing that I remind myself of

I'm guessing this is an ADHD thing, however I am undiagnosed. This happens at least once a week, where I know I have to do something, I remember "hey I have to do that thing", and then don't do it. Happens on mostly minor things, like when I have to grab a battery at work, or making a pit stop on the way home. I would consider myself to be mid-to-high functioning, but this is one of the little annoyances that I tend to keep doing.