To get good SERPS for competitive keywords is no easy task at least not quickly. But with the right approach there are ways to do this much quicker. Here are a few tips that will help.
1. Make a video and upload it to as many video sharing sites as possible.
2. Upload an article to docstoc.com with the keyword as the title if possible.
3. Submit an article to ezinearticles.com with the keyword as the title.
4. Use high quality backlinks pointing to the URLs of everything submitted.
5. Submit RSS feeds from these sites to RSS agregators.
Doing the 5 steps above will help greatly in efforts to get good rankings in Google, Yahoo and MSN. There are other steps to help but this is a great start to get traffic and to make money online.