Pay attention to your drains. Most plumbing repair calls are for clogged drains.
Grease builds up over time and causes clogs. There are preventative measures you can take to counteract grease buildup.
Pouring boiling, sudsy water down the drain periodically will reduce grease buildup.
In most cases, hair can be trapped in some sort of screen or drain cover. Talk to your local plumber next time and ask about ways to prevent the hair from getting in the drain. It's much easier to gather hair off the screen periodically than it is to deal with a clogged pipe.