If your water heater never gets the water as hot as you would like, and you don't think that the problem has to do with the distance from the tank to your shower or sink, the problem is most likely the water heater. If you have an older water heater that is stored in a basement or somewhere in the home, and it takes up a lot of space to store gallons of water, it's time to upgrade. Talk with a hot water tank installation professional about the following things.
Upgrading to Tankless
Updating to tankless water heater is the best option for the home because it's more efficient, and it reduces the risk of a tank flood. It can also improve the quality of your drinking water. The water won't sit in a tank that can develop mineral accumulation over time, and instead it just comes out through the tank when you need it.
The tankless option heats water as needed, instead of keeping water warm for use whenever, so it isn't wasting energy around the clock either. You can get as much water as you need for multiple appliances at the same time, and this unit doesn't take up much space. It can be hidden in a closet or cupboard.
Getting More than One Heater
You can improve the efficiency of the tankless system even more by installing more than one unit in your home. If you have a lot of appliances and sinks that use water one side of the house, and the other appliances are far to the other side, talk with the installation professional about getting two separate units used for the different areas of the house, and so you are using the least amount of energy as possible. This means more hot water fast with two tanks.
There are many concerns with an old outdated water tank. The interior could be rusting, the pilot could be a fire hazard and goes out, and if a pipe leaks or there is a crack in the tank you could end up with gallons of water all over your home. Improving your home by updating to a tankless unit doesn't just help you lower your utility costs each month, because you aren't wasting water to wait until the warm water gets through, and you are conserving energy, but it can also be a great selling feature for the future.