I would write everything down so I can remember things. Some memory things that help me is trying fill in crosswords, search a word crosswords, sudoku to fill in numbers, reading self-help books, and do things to help out with memory techniques and tools.

There are a few things I learned to do. I have a small notebook that has each day date 📅 on the top of the page. Under that are a number of lines that have the time of day on one side of each page. So after one day ends I turn the page to see if something is written on the next page and what time that event is happening. Ex after one day is over I turn it to the next page and see if something is planned to happen that day, a Dr appt. at 2:00 pm. So I know what is going to happen the next day and prepare everything the night before.

I like to play memory games

Cell phone calendar reminders. Example, a Doc appt next month.
Phone beeps reminders before the appt. By 5 min, 1 hr, 1 day, 2 days, 1 week, 2 weeks. Also, as Julie10 said, Post its.
Keep positive as unfortunately the meds taken to help seizures decline, also declines memory.
I honestly was to add in something else to say, but forgot what it was.

I own a lot of post notes and note books I also start right like note book per kid of what I remember of there birthdays holidays stuff for them