Drain the sediment / Water heaters should be drained once or twice a year to control the buildup of sediments, as, naturally, any blockage within a system can prevent it from operating at top efficiency. The more laboriously a machine operates, the more energy it uses up.
Insulate exposed hot water pipes
Insulating hot water pipes will help you conserve energy, since the warmth they retain—as opposed to the cold they could otherwise let seep in—will also keep water hot. HouseLogic.com states that insulated water pipes enable water to come out of the tap two to four degrees warmer.
You can do some of the tips outlined here on your own. For other tasks, however, you need the expertise of knowledgeable plumbers. For help with your water heater problems, competent plumbers in Denver like Total Plumbing, Inc. are your best bet.