NEVER flush anything down the toilet besides human waste and toilet paper. Even if wipes say “flushable” they should not be flushed because they will clog your line.
Regularly check toilet for leaks and make sure it is not running. Keeping your toilet clean can help spot leaks or problems with plumbing fairly quickly.
Do not use chemical drain cleaner to unclog drains as it can damage the pipes.
Keep your water heater well maintained and flushed regularly.
Do not put food or food scraps down your garbage disposal as it can cause your disposal to jam or break. Throw the food/scraps away instead.
