Does writing it down make you more or less likely to do it?

I once dated a guy who would have to write down the only one or two obligations he had and I was totally uncomprehending… if you only have two things to do, how can you possibly forget? Meanwhile I kept dozens on my mental list each day … I guess he probably had ADHD and I was an asshole idk

Less likely. The only way for me to do things is to do them immediately.
I'm a mental note person. I don't have an agenda. Except the one at work, and thank God for reminders cause I only glance at it.
I write down grocery lists and then don't bother to look at it in the shop.
If I write something down in a notebook, I will most likely misplace it, or write a new list on the next page, and in the end do things independently from it anyway.
Relatively few things slip my mind though.

I write things on a piece of paper. If I’m making a grocery list I just write the list. If I’m planning my time, I write each day of the week and then what I’m planning to do that day. If it’s for work I use a regular 99 cent notebook. I tried using a calendar many times but I’m repelled. I throw all the paper away when the shopping trip or week is over. I use scrap paper so I’m not wasting anything. Or hoarding anything.

Though I do keep my notebooks. No regrets about that bc it helps me feel like I accomplished something.

I buy these pocket-sized Muji notebooks in packs of 10:

https://www.muji.us/cdn/shop/products/greya7_1260x1260.jpg

Both work and home stuff is quite similar. Memory is shot so I write down the shopping/working task list in one rolling .txt file where I add and delete lines.

The file is never deleted. It will be there when I die.