Ask HN: What is it that you forget about most when it comes to your health?

I have a deficiency in my iron levels; I'm suppose to have a medical exam once a year but I always forget that, also I need to have a especial diet in order to help my body increasing iron levels but for me is very difficult to follow up

Mindlessly walking to the fridge and stuffing something in my mouth, then doing it again, then realizing I was actually just thirsty.

Also, sleeping enough and not at such weird times.