gameutopia i don't agree with this "...If you have common keywords that everyone else is using such as dating, networking, friends, etc...etc..."

I have 3 keywords as "dating", "singles" and another 3rd that brought my site on the first page, not lesser than the 3rd link. And yes, my website is still beginning, not too many members though... So in my opinion this whole SEO doesn't have a success definition anymore. Just make sure that what you write in your site title see more words to be found also in your keywords and in your page content, as many times as possible, but not ambiguous and you will succeed as i did, in less than 1 month.
Short example: If you sell blue airplanes make sure that "blue airplanes" can be found in your site title, in your keywords and in your content as many times possible. And if you link exchange, make sure your link does'nt have the description as "Click here" but "Blue Airplanes". And i think that's all.
You can also rely on a meta tag analyzer such as this one at http://www.submitexpress.com/analyzer/ and improve your keyword density. Good luck!