You may find it easier to compile several checklists (covering personal, study, and workplace, for example). Try different approaches and use the best for your own situation.
But in you’re in an operational role, or if tasks are large or dependent on too many other people, then it may be better to focus on a longer-term checklist, and "chip away" at it day-by-day. Many people find it helpful to spend, say, 10 minutes at the end of the day, organizing tasks on their list for the next day.
Checklists prevent you from forgetting things. Many times, we as human beings tend to skip many things knowingly or unknowingly. Checklists, however, lays stringent benchmarks for each and every process and see the functioning to be fool-proof. There is a wide range of checklists practiced all over and below are few product testing checklist templates for you.
Or, imagine you’re in a sales role and have a long list of people who you need to talk to. You write out a checklist of everyone you need to call and every client you need to see, and start prioritizing.