Sleep cycles & a calculator that tells you the best times to fall asleep depending on what time you need to wake up in the morning. How interesting- if you need to be up at this says to go to sleep at either or due to different sleep cycles.
How to get white toenails: mix a small amount of baking soda and hydrogen peroxide together. Make into a paste. Get a tooth brush and scrub the paste onto your toenails. Then soak your toenails in the paste. Let them sit for 5 10 min. Then rinse off toes.