In 10 minutes i can vacuum, or spot clean windows, or dust the main floor, or quick clean the man room (Dust AND vacuum).
In 15 minutes i can get my kitchen from a sinkful of dishes to spotless, save for some of the ground in grunge on the cabinets...but that is another 15 minute project. I can also fold and put away one load of laundry in 15 mn or less.
What can you do in just a handful of minutes? Get out an egg timer and do it now!!