How to do tomorrow's planning today
It made me
Disciplined 
"He who every morning plans the transactions of the day and follows out that plan carries with him a thread that will guide him through the labyrinth of the most busy life. --Victor Hugo"
How I did it: This was like any other habitual goal: I just had to force myself to develop the habit. Because my evenings are usually busier and kind of late, I decided to use my mornings. Instead of playing games or watching the news or going online, I sit down with my coffee and my planner for half an hour every morning. It's a great way to focus, and I always know what to expect that day.
Lessons & tips: It may not be the case for everyone, but I found my PDA to be a limited resource. It's nice that you can carry it with you everywhere, but it lacks the immediacy of pen and paper.
Resources: A Franklin Planner.
