it's not about the length of the title its about the catch, make it interesting for someone to click on it.

if you don't know how to do things then its better to hire someone to create the forums for you, also hire a team to optimize it.

one of the most important thing to gain members, make interesting topic, and give them enough reason on why to join your forums, a unique and interesting content will do.

social networking is also a good way to increase traffic in your websites, building reputation in social networking sites is very important.

yes it's very important to gain followers on social networking sites, encourage them to join your forums, also try to give special prizes for someone who can refer your forums to other people as...

try to participate in social networking sites, and gain friends there that has interest in your niche, try to encourage them to join your forums as well, and also give them a good reason why to join...

its better to post on lots of article submission sites, but ensure to put anchor text, also try to search for high PR and do follow ones, you will gain backlinks and SERP by doing this.

You can start by optimizing your website, in order to increase traffic your website must be placed in the first page of google for a certain keyword, we all know that traffic is important to gain...

Both of these methods are important so you should pay enough attention to them, but if you are low on budget its better to start of with SEO methods afterward you can go to PPC..

I believe that adwords can deliver a lot of traffic, but you shouldn't stop researching for other methods, try experimenting its worth a try..