1)YOUTUBE,,,Best way to advertise a server,,
2)SRO Forums
3)SRO Websites like take a ad slot on rev6.com
4)Google ads
5)Facebook
And ofcourse u need screenshots,good photos
and a well spoken english...
And then if ur server is rly nice and good system, u will gain people like 400/500 player on the first day
ofcourse the most important,Launch the server after 1 full week of adevrtising
people will wait for it,and u launch it on a good time ,many would love to join a fresh newly opened server.
edit: here is an advertising thread i made for tmn
i dont update it,too lazy to make better design but its still good
here is another thread i made for a friend too long time ago