Still talking short stories: have you considered having more than one protagonist? Buddy pictures and most romances have two protagonists. And while this works in Romeo and Juliet, and Lethal Weapon, I strongly recommend you not try it in a short story. There generally isn’t time and space to build enough caring about more than one character. I am not saying it can’t be done, just saying it’s not for us beginners.
Once you know whose story it is, I’d suggest you write the opening line. You don’t just want good… you want perfect. It’s a short story: you need to hook the reader in right away. A great first line will entice the reader enough that he or she can’t put the story down. That first line needs to invite us into the scene. It should have some surprises. How can a first line be surprising? How about the opening line of 1984 by George Orwell: “it was a bright cold day in April and the clocks were striking thirteen.” I thought this was an ingenious way to show that the world he’s describing is slightly off from the real world.
That opening line should also establish a voice. It needs to be clear. For example, does anyone NOT know the first line of Melville’s Moby Dick? “Call me Ishmael.”