What is working for SEO now

So how is everyone doing recently? Have you ever felt SEO is getting harder and harder. What used to work well for SEO nowadays is falling out of the picture. Here is a list of techniques that used to work well:

-excessive keywords repetition in webpage

-social bookmarking site like digg.com

-buying links from other websites

-commenting on blogs

Although some of the techniques listed above are still worth trying, how effective it would be is unknown. Personally, i have been searching for new ideas and techniques that adapted well to Google's change. One thing that i have recently started to adopt is the creation of sub-domains. First of all, these squidoo like sites usually have a very high homepage PR and therefore that PR can get transferred over to the sub-domain over time if you can keep the page fresh and unique. Secondly, a lot of sites usually have "do-follow" link, which is much more valuable than "no-follow" links. There are so many websites that let user generate their own contents and their sub-domains, one of the sites I would recommend is weebly.com. So take the action and get your keywords picked before it is too late.