The best advice I can give a writer on submitting is to make sure that you've had your story critiqued by a writing group. You'd be surprised how often writers skip this step. Have it critiqued, revise it, polish it, and let it sit for a few weeks. After all of that, when you're happy with it, send it out to journals. Every time I open a submission, I am hoping that it will be marvelous. So check for typos, use standard submission format, and send us your best work! I look forward to reading it.