One which I completely forgot about.
To be fair.
I was last reminded about it on Saturday--verbally. By my mom. While I was probably doing something else. Playing league, watching a video, the likes. Where I heard her and technically processed her words but because I was doing something else the something else took priority on my thoughts and the reminder went to waste.
I never received any form of reminder from the clinic itself.
Not via email (which they usually always do?), not via phone, not via text, nothing from them at all. They didn't even call me after I didn't show up, nor send an email, nothing. Except apparently a bill. That they were sure to send. But nothing aside from it exists as evidence of the missed appointment.
Of course I didn't remember.
My only reminder came days ago, in a format which I am prone to forget five minutes later.
For a verbal reminder to have a chance to stick, I need to not be doing anything and it needs to be the day before, and even then it's only a 50% shot at it and not a guarantee.
This did spur me to double-check my work schedule, though--good thing, too, because I had completely forgotten that I work this Thursday, too. Typing out this reminder here as well as also talking to my girlfriend about it is a fairly decent way to ensure I don't forget about it, tho.