Wipe up spills with soapy water made with an ammonia-based cleaner and a soft sponge.
Do not use abrasive cleansers or scouring pads to clean your countertops, even if you have the matte finish.
Consider buying a solid-surface cleanser to clean high-gloss countertops. A high-gloss finish can dull more easily.
Disinfect your countertop with a bleach and water solution.
Never put hot pots or pans directly on your countertop.
Last but not least, use a cutting board when cutting, never cut foods directly on your counter.