How to properly disinfect surfaces
This is honestly a HUGE topic, with literally reams of government guidelines on what's effective for surface disinfection.  For example:


USDA Clean Then Sanitize
FSIS Cleaning Regulations
5 Steps of cleaning and disinfection


So partly this depends on how sanitized you want things to be.  For my part, I just clean my counters with a mixture of Simple Green (a concentrated organic soap) and water.  If you're really concerned, you could do a second washing with a weak bleach solution (wear gloves!).