If you're working hard on something, and chances are that you are, it can be very discouraging to not experience immediate results. Of course, we'd all love to work out and then immediately see the results, whether on the scale or in the mirror, but it doesn't work that way. Over time, the changes we make or the things that we do build upon one another to yield great results.
Likewise, not acting on your desires to be the person you want to be gets you no where. Don't discount the power of a single day. Even if you don't feel like you make significant progress in a day, you can't build the life you want with out the daily efforts. Keep working, keep going. Even if you slip up on whatever your goal is, that's okay, it won't effect the overall result as long as you are continually working on that dream. Use today to your advantage and make some progress on your goals!