Advertising servers?

What are some good places to advertise your server?

I have been co-owning a server with my friend, and it has been hard to gather players. We get around 11 on at peak times, but usually have few. What can we do to increase that number? We are friendly to all the players, and usually give them a warm welcome when they join, sometimes if there is time we even say hi to the personally.

http://puu.sh/4jPMv.png

everyone seems to miss it

to advertsie, go into the game in progress section.