I don't focus on 'SEO' specifically anymore. Where I put my focus is on promoting my forums generally. It seems to me that Google is going to either like my site or not like it, and my focus should be on getting people to visit in the first place. Shawn makes a good point about making your site better, the other part of that is getting people to visit. Now, every site is going to be different in how you promote it. In a case like a forum about carpet cleaning, your target audience is very well defined and inviting people one at a time to visit might be releasable for you. If you were doing a forum about baseball, on the other hand, inviting people one at a time might not be as viable an option. Anyway, to get back to the point, focusing on SEO by itself isn't really a good strategy and it's not that you should ignore it just that it can't really be your main focus.