Rabbi Moshe Chaim Luzzatto (18th century Italy) wrote:
"I cannot deny that it will take hard work to free yourself from negative traits. Nevertheless, I can honestly tell you that not as much effort is needed as might at first appear. What you need appears more difficult than it will actually be in practice. When you are sincerely motivated to work consistently to free yourself from your faults, the positive habits you begin to establish will render the entire process much easier than you originally thought. Experience confirms this to be true."
Today, think about what positive habits you'd wish to master. Either write them down, or make a mental picture of how your life would be enhanced by mastering these traits. The stronger your feelings abut how much you will gain, the more motivated you will be.
(see Rabbi Moshe Chaim Luzzatto - Path of the Just, ch.11)