Needing to make more than just a mental note

I need to get back into the habit of writing ‘to-do’ lists. I keep starting the day with a mental list of all the things I intend to do that day and then I end up getting busy and distracted and it’s only when I then get to the end of the day when it’s too late to make phone calls and things like that, that I suddenly remember several things that I’d intended to do that day. So I make a mental note that I will do them tomorrow. Only when tomorrow comes, the same thing happens once again.