New forum – 10k posts in 1 month, over 200 users, what is best way to advertise?

I started a forum a month ago, and currently as almost 11,000 posts actually, with over 200 members, most seem active. It averages 1,000 new posts a day, 5-10 new members a day, and slowly grows (that 1,000 is a good guess, could be more). Uniques per month is somewhere around 3,000, with about 2.1 million hits a month total.
Anyway, I’m using SMF, and haven’t put any advertisements yet. The forum is mainly for a woman audience, so when I DO put ads up believe me, they will say something, so I don’t want to spam/put ads everywhere.
What kind of advertising is best for this, and where should I put them?

Original post by Quintox