Inside the envelope, enclose a self-addressed stamped envelope (SASE) and return postage. (Of course you will keep a copy of the manuscript on your computer and a safety copy on a CD, flash drive, external hard drive, or an off-site storage such as Carbonite.)
After that, you wait.
And you wait.
Never call an editor unless you have permission. Their guidelines will tell you how long it normally takes. Give the editor at least one month beyond that time. If you haven't heard after five months, send a letter with SASE and say something like this:
On December 25, 2009, I sent you my article titled, "Beyond the Amateur Look." If you're still interested, please take whatever time you need. If you're not interested, please return my manuscript.
I've enclosed SASE for your convenience.
None of this information guarantees you'll get published. It does assure you that you'll look professional and editors will assume you're not a beginner. That's a good start, isn't it?
Conforming to professional standards is never wrong,
and it may help you get published.