Today is World Usability Day. If you do nothing else about usability today, the least you can do is to observe a minute of silence (at noon EST) “as a means of sending out the hope that there be a greater respect for all users and their ability to make the world a better place, through the time won by greater usability.”
Maybe during that minute of silence, you could also heed designverb‘s suggestion and “think about everything that you use, touch, see, or hear and ask, how can I make it better? Is something broken, confusing, too complex, or just not working?” I know of one guy who thinks about that stuff, and then blogs about his frustrations with unusable products.