When you have big goals and are a highly productive person, it can be hard to remember and appreciate the little achievements you've made in a single day. Marc Andreessen, co-author of Mosiac and co-founder of Netscape (among many other innovations) has a solution which he calls the "Anti-Todo List".
At night, before going to bed, Andreesen writes three to five things he needs to do the next day on an index card. The second part of that system is just as important: throughout the rest of the day, use the back of the card to record every time you do something useful.
Each time you do something, you get to write it down and you get that little rush of endorphins that the mouse gets every time he presses the button in his cage and gets a food pellet.
And then at the end of the day, before you prepare tomorrow's 3x5 card, take a look at today's card and its Anti-Todo list and marvel at all the things you actually got done that day.
Then tear it up and throw it away.
Another day well spent, and productive.