Many people make a "ToDo" list by job time - how long it takes a given task 2 B done, from longest time or shortest time.Some people list things N order as they think of them. I prioritize by what needs 2 B done. A items absolutely have to get done NOW. B items are things that can be done later.
'C' items would be nice to get done - sometime. When A's are done I re-prioritize. Some C items have dropped off. Some new A's may be added. B's have moved to A's or dropped to C's. Always be working on the important tasks in your life and you will be happier. Nit-picky 'C's aren't worth the worry.