I am one of the most disorganised people I know. If something isn't written down it's very likely I will forget it. Thats where lists come in to save the day.
I have lists for everything. I have a to-do list at work. Then on my phone I have multiple lists in various formats. I have a list of jobs that need looking at in the house, items I need to remember to buy and a bucket list. I have a list for topics for blog posts and a list for things I need to remember/avoid or do in my novel. I have a to-read list on Goodreads and I employ lists to keep track of tweeters on twitter.
As I write this I can see how much my life is run by lists and I didn't realise just how much until I started typing. Now I have a list of lists.
Are you a list user and how so?