Is your water heater more than 7 years old? If it is, you may want to start shopping for a new one.
Most water heaters are functional for ten to fifteen years, but doing research before you have a problem is recommended. If your water heater fails, you will need it replaced quickly and may not have time to properly research the correct water heater for your home.
If you are constantly running out of hot water in your family, you may want to check out the very energy efficient tankless water heaters on the market. We have several pre-screened plumbers here in Denver that will be happy to help educate you.