working at something until it regularly works for you.

Long hours spent checking off a to-do list and ending the day with a full trash can and a clean desk are not virtuous and have nothing to do with success. Instead of a to-do list, you need a success list — a list that is purposefully created around extraordinary results.

To-do lists tend to be long; success lists are short. One pulls you in all directions; the other aims you in a specific direction. One is a disorganized directory and the other is an organized directive. If a list isn’t built around success, then that’s not where it takes you. If your to-do list contains everything, then it’s probably taking you everywhere but where you really want to go.

It is those who concentrate on but one thing at a time who advance in this world.” — Og Mandino