Thought I'd do this, considering the quality of most the posts in here.
- Make it neat - Most experienced players or forum users prefer well written out posts, rather than textspeak or whatever.
- Give information - Requirements, Location, Playing style preferred. Let people know why your tribe is for them.
- Post on the forums before-hand - Try and seem like an active player, and people are more likely to want to join you.
- Try other means - Not many new players use the forums, so you might want to try messaging players around you. Not many forum posters are from K4 or wherever, so it's worth a try.