The answer to how Chris Gampat gets his image so sharp starts with the creation in the camera. For starters, it begins with calibrated display and using Adobe Lightroom 5.
Something that I harp on in lens sharpness tests is the need for the use of a flash to create speclar highlights-which are little extra details that come out when a strong light soruce is added.
Sharpening your images doesn't mean using sharpening masks. Chris Gampat has a style that may help you to create that effortless sharp appeal. It'll mean looking at your lens sharpness and the use of your flash.