You can’t have a better tomorrow if you are thinking about yesterday all the time. — Charles Kettering
Every night, contemplate: What good did I do today? How can I do better tomorrow? — Mata Amritanandamayi
The more riots that come out of our college campuses, the better the world for tomorrow. — William Allen White
Let us take one day only in hands at a time. Resolve to do good today and better tomorrow. — Catherine McAuley
If you won’t be better tomorrow than you were today, then what do you need tomorrow for? — Nachman of Breslov
If it’s a good idea, do it today. Not tomorrow. A good idea rarely gets better over time. — Larry Winget