Avoid plumbing service! by keeping your plumbing systems in good working order.

Electronic Systems:
On heating and other electronic plumbing related systems you may want to meticulously run the maintenance program recommended by the manufacturer especially replacing or cleaning filters. It may prevent from faster Wear and tear, save you on electricity bill and prolong the life span of the system.

Clogs:
Firstly get (if you don't have one already) a strainer to stop all hair and soap, from going through the pipes, make sure you keep the strainer clean allowing the water to go through, try to do this on regular bases.
Avoid cooking oils from going into the plumbing pipes.
If your drain is completely clogged using caustic ingredients can severely damage your plumbing system as it will get stuck between the pipes. Try to snake the drain rather, if that doesn't help then contact a professional to do so.

Toilets and Faucets:
Periodically check under sinks for leaks. You can detect leaks by the level moisture.
Try to immediately repair leaky faucets regardless of water bill savings it will save you from irreparable water damage to your pipes and fixtures. Though might be involved with some work removing faucet aerators annually will make sure you get constant flow of water.
Periodically check if your toilet is leaking, one trick is to add a tiny quantity of dark food coloring to the tank then if you see that color dripping down the tank it's recommended to repair the tank ball.

Garbage Disposal
Don't run the disposal on "dry" use a flow of water when running it overloading it may breake and cause faster Wear and tear.
Hard pieaces of garbage should not be disposed.
Even if clogged avoid using anti clogging chemicals "