The reason why you feel un motivated the next day is because you now know the amount of effort you'll have to do ... for example if you have a long lists like:
1) Exercise.
2) Groceries
3) Clean.
4) Laundry
5) Read
6) Do something ambitious ...
Most people focus their AWARENESS on the whole lists of effort you have to do and they get overwhelmed leading to procrastination. This is called Homeostasis where the brain tries to reserve energy so it gives you the emotions of laziness or procrastination.
Analogy:
Like an inexperience rock climber looking at a giant mountain and seeing how ridiculous high it is ... he/she will feel overwhelm of the amount of work he/she will have to do. But, for a more experience rock climber ... he/she will focus on the first step ... that first rock he/she will have to hang on to. Then once he/she has succeeded on getting to that first rock ... he/she focus on the next rock. This is what we call FLOW. When you are present in the moment and your whole AWARENESS is on what is the next step not the whole lists of steps you have to take. You will get this sense of Presence and actual enjoy the tasks!
Therefore, just focus on the first thing you have to do. For example, going back to our lists, the first thing is Exercise. Then break that up into small steps like,
Exercise
1) Put on gym shoes.
2) Get in car.
3) Drive to gym. (Well since I am already here at the gym ... mine as well start exercising).
4) Do first exercise ....
5) Focus on the form of your exercise instead of finishing all the reps.
The next thing you know you just finished your first goal on your to do lists.
Summary: Focus your AWARENESS on that first step not the whole lists. This will shift your focus from the outcome of getting shit done to focus on steps 1, 2, 3 , 4 to getting shit done.
This can be applied to pick up ... explained by Tyler Durden from RSD:
Tyler's Top Secret to Making Pick up Super Simple (Has INFIELD of how to do this ....)
http://www.youtube.com/watch?v=WloORPfKnD4
Other books to read to beat procrastination:
1) The War of Art: Steven Pressifield
2) Flow the Psychology of Optimal Experience - Mihaly Csikszentmilhalyi