To make a popular keyword move up in the google search results is not a easy thing. We should avoid trash link develpment ways such as posting trash replys and trash articles. I believe building a blog and insist on submitting quality articles may work well in keyword seo. First talking about building a blog, it could be a free one like blogspot, or a payed one, which is better. My personal blog: http://micmm.blogspot.com has only started for 6 monthes, but it got good PR and content, which would be more better performance in next pr refresh. I have faith in it. And since a lot of post there has got pr and are reference to the keywork it linked to, so it is useful for the keywork rank. Submitting articles is always considered a good way to do, but keeping submitting the quality one is the hardest part, don't do trash, never do. Always pay attention to the article relevance, it's extremely important after my several monthes trying. I submit pet care articles for my http://www.focusonpet.com, and submitting gardening articles for my http://www.gardencolumn.com. It both got a great result. You could check the link or check it after the next PR refresh time.