Depending on the situation it's a combination of to-do list programs on my phone and computer, I personally use both Google Keep and Todoist, and physical check

Depending on the situation it's a combination of to-do list programs on my phone and computer, I personally use both Google Keep and Todoist, and physical checklists that I either type out and print or hand write. For the most important checklists, especially at work, I will usually hand write them in addition to using a computer. I'm a stickler for good penmanship and I find that taking the time to make an outline of my checklist and then transposing it to a handwritten pad involves a kind of deliberateness that is both somewhat relaxing and helps insure that I've covered all my bases, while only adding a few minutes to my day. Less important things may start off as a physical checklist but then once they become second nature enough I just rely on memory. But again, for things where mistakes would result in something more than a minor inconvenience I still use physical checklists. The beauty of these checklists for me is that instead of having to remember 5,10,20 or 50 individual things, I just need to remember one thing, that is to check the checklist.