If your faucet drips enough to fill an eight ounce glass in just 15 minutes, then you will waste 180 gallons of water in just a month. Making it 2,160 gallons in an entire year. Do you want that much water on your conscience? I think not. Call a plumber, you dope. He can do leaky faucet repair in 30 seconds. What about hot water heater problems? In a typical home in a single year, over 9,000 gallons of water are wasted just from running a faucet to get hot water. Shameful. If your hot water heater is in prime working condition, you can limit that significantly.
While the most famous plumbers in the world would be the Mario Brothers of Nintendo video game fame, I bet your local plumber will do a better job at something like toilet repairs. Unless your toilet is broken because of a Goomba, that is. Then call Mario and Luigi. But your friendly neighborhood plumber will know how to repair a toilet or how to replace a toilet tank.
If your house is old enough, it may be time to call in the plumber to look at your pipes. No, that is not a euphemism. If the pipes in your house are old enough, they could be ready to bust at any moment. And if the house is really, really old enough, you could actually still be living with lead pipes. Lead was the prominent pipe material of choice up until the 30s and 40s, when they finally started realizing how terrible lead was for human health. Copper is now the pipe of choice, and they have even been found as old as 2750 BC plumbing, but the dreaded lead pipes were more common back then.
For your toilet repair requirements, you need not be concerned with lead pipes, but you cannot really procrastinate and put off something like toilet repair. Nor should you put off any plumbing repair needs for that matter. Just make sure you put in a call as soon as you can, and a plumber can fix things right up for you.