Favorite short stories?

What are some of your favorite short stories? I need some good shit to read.

Neil Gaiman's collections "Fragile things" and "Smoke and mirrors" are very good especially "Snow Glass Apples" and "How to talk to girls at parties"
http://www.neilgaiman.com/p/Cool_Stuff/Short_Stories/How_To_Talk_To_Girls_At_Parties

I'm also a big fan of Frank O'Connor, Stephen King, certain Anne McCaffrey short stories, Saki and any short story interstitial's from larger fiction series.