Daily Question that Everyone Should Ask Themselves

I went out of town for a long four day weekend to help my friend Michael move into his new house. This was an exhausting two day process, but I enjoyed spending time with him again (we used to teach together). To thank me and the other people who helped him, Michael and his wife took us out for dinner. At the dinner table, he asked each of us to tell the worst part of our day and then he asked us all to share with each other "How did we change the world today?" I had never been asked this question before. I thought is was a very interesting question. He went on to explain that he asked himself and his wife that question everyday to motivate him in his daily activities. I think that I will now make it a practice in my life to do the same. I will wake up each morning and ask myself "How will you change the world today?" I think this will make me have more of a goal, direction, and positive influence on my life. So, now I ask you the same question, "How did you change the world today?" Post your replies in the comments section.