Medications can usually be thrown in the trash, since our landfills are sealed. The best option, particularly if you are concerned about someone fishing them out of the trash, is to return them to the pharmacy or police station for proper disposal. You may also be able to bring them to a hazardous waste disposal collection.
Medications are detectable in our drinking water and although the amounts are probably too small to hurt you, think about the small animals and fish who are getting a much larger "dose" based on body size. Specifically antibiotics, and other medications as well, harm the beneficial bacteria that other life forms depend on to maintain water quality and food supply. The problem will only get worse if we keep flushing medications in the toilet, so stop now before it gets worse.
#2 Tissues and Paper towels
I even made a educational video demonstrating how to change a toilet paper tube in case you need to share this with your family members. who seem to think grabbing a tissue is easier and think nothing of leaving the next person in this quandry. Please feel free to share.
#3 Tampons, Napkins, flushable wipes & more
Granted I find the "Grease jar" in the kitchen to be very "gross" with a nauseating smell when opened, I find pouring the grease from just one meal into a small disposable container, works just fine. You will get some grease in the pipes anyway, when you wash dishes, so don't press your luck by pouring it down the drain or by flushing it.
#5 Hazardous waste
#6 Others: Laughter is the best medicine
To avoid hair clogs, brush hair a little bit back from the sink, you can clean up the floor later. Brush hair just before you shower. You will lose hair in the shower too, so put a drain trap over the drain and clean that regularly. It's normal to loose 100 hairs a day, more if you have thicker hair, and those of use with longer hair are certainly going to notice this more. Do the best you can, but please never clean the hairbrush and throw the hair in the toilet. It goes in the trash.