Todoist is great. Shameless plug, but if you're on Mac / iOS, you can also check out Defer ! It's a bit simpler and streamlined compared to Todoist if you just need something simple.

Can you add more context? Do you mean a to do list?

ClickUp is a great app for tracking daily tasks and to-do's at the office. It has features like task lists, reminders, calendar view, time tracking, collaboration, and more to keep you organized and productive. Definitely recommend checking it out!