I worked for years in the restaurant business. You see those dreaded one tops all the time. As a server you think, "oh great, not going to be much of a tip." That really is not always the case I have learned.
One thing I can safely admit to is that I am addicted to my phone. How about you? My phone even lets me know just how addicted I am. It will give me a report every week telling me how much I am on it.