Never ever pour cooking grease down the drain. Wipe greasy pots and pans with a paper towel. Run plenty of hot water when rinsing greasy items.
Do not put cotton swabs or garbage down them. Install a soft water conditioner to keep bowl and jets clean. Do not store small items above them. Keep the seat closed.
Run plenty of cold water when chopping vegetables. Keep cooking grease out of them. If it will not turn on, check the breaker and the reset button usually located on the bottom of the disposal. Never stick hands or objects in them.
Clean the lint trap regularly. Be careful when washing old blankets or throw rugs.
Install a strainer to catch hair. Never take the screens off or break out the crossbars. Be careful of the plastic razor guards.
Install a strainer. Run plenty of water.
Frozen Water Lines
Turn up the heat in the house. Open up the cabinet doors. Remove the aerator if there is one. Open faucet handle(s) all the way.
Add a form of bacteria to the tank. Avoid bleaches and drain cleaners that are harmful. Use low sudsing laundry detergent. Read labels and make sure the treatments are safe for septic tanks. Have tanks pumped regularly.