I’ve been using the 1-3-5 method for several years as a way of focussing on the task in hand on a daily basis. It comes up in client sessions so much, it’s worthy of a permanent place here.
This technique is simply to reduce the daily to-do list to just 9 tasks.
5 small tasks
3 medium tasks
1 large task
The size of each task will vary depending simply on how many hours you have in your particular day and the order is up to you. The 1-3-5 gurantees that every day, you've accomplished 9 things.
Credit to The Muse who originally bought this to my attention.