Periodically check for leaks under the sink where the hose connects to the water supply. Look around the base of the dishwasher for evidence of leaks, such as discolored, warped, or soft flooring materials, or water damage to nearby cabinets.
If your refrigerator has an icemaker, make sure the hose connection is securely attached to the water supply line. Also, a wet spot on the floor may be a sign of a crimped icemaker line about to burst.
Replace deteriorated caulk around sinks, and check the pipes under the sink for leaks. A slow-draining pipe may indicate a partially blocked drain that needs cleaning.