Keep your Drains clean:

Put your oils (cooking grease, lard, vegetable oils ....) into a container and discard with your solid wastes.
Use plenty of water when running the garbage disposal. This will help wash down all material that could build up over time.
Put your coffee grounds into the green waste, not the drain.
Once a Week Pour a pot of Bioling Water down the drain to remove oil and fat build up.

Clean the drain areas often. Hair and other material will collect and eventually run into the drain system and start clogs..
Only flush toilet paper, not other heavy paper products (paper towels)..

Avoid putting chemicals (other than commercialy approved drain cleaners), hot wax or other similar substances down your drains.
Do you have a sceptic Tank? If so have a professional inspect it every two to three years.
Twice a year use a quality drain cleaner in your drains..