Skeleton Crew remains my favorite short story collection of his, read it as a kid. It has The Mist, of course, but also a story that stuck with me to this day, The Jaunt. The Raft was pretty fucked up too.
Night Shift, his first one, might have been the first King work I read at maybe 12 years old and is a close second among his anthologies. A bunch of these got made into TV/films: Jerusalem's Lot, Graveyard Shift, The Mangler, Battleground, Trucks (the Emilio Estevez movie Maximum Overdrive), Sometimes They Come Back, The Ledge, The Lawnmower Man, Quitters Inc, Gray Matter, Children of the Corn were all adapted in some form or another. Dude could have probably retired for life from the film-rights sales from that list alone. Gray Matter, like the Jaunt, is still stuck in my brain; that was some freaky story.