Hi Alex,
I'm not an expert but I have had a few articles published in magazines in the past.
First I emailed the mags and enquired as to whether they accept unsolicited mateial and if they have a contributors guidelines, this way you have an idea as to whether the magazine uses their own writers or not and guidelines are always helpful.
Then I've studied a few issues of the magazine (understand their style, etc) and then just written the article and sent it off. If it's rejected I'll search elsewhere, tweak the article to the new magz requirements, etc.
I'm sorry, Alex, this probably doesn't help you much. This is probably a really long, drawn out way of doing it and I expect there is a much simplier and more affective way, lol.
Good luck
Alana
<Added>I think with some of the women's mag they use their own writers. I had a story/article published in Take a Break once and it was re-written by their own writers. It might be worth checking that as well.
Alana