Clogged tub/shower drains are more common in the fall. According to scientists in Sweden, there is such a thing as seasonal hair loss from October onwards. Humans lose 50 – 100 hairs everyday mostly when you brush your hair or shampoo it. The best way to prevent a drain from getting clogged would be to brush your hair before you shampoo and  install a hair screen in the drain. If your drain gets stopped up you can try pouring 1/3 cup of baking soda, 1/3 cup vinegar into a cup of water and pour it in the drain.  A chemical reaction of fizzing will take place, then add hot water and use a plunger to loosen the clog.  If this doesn’t work, it may need snaked out.  It is best not to use chemicals because they can corrode your pipes.
