I prefer performance based SEO - you pay just for achieved results!
Some of the keywords I have in top10 of google:
[login to view URL] - top 10 songs, top 20 songs, top 50 songs, ball screw, ball screw repair, tom yum, tom yum soup, braces new york, invisalign new york, braces ny, braces new jersey, what is arthritis, brazilian diet
[login to view URL] - log cabins, manchester taxi services, manchester aiport taxi
[login to view URL] - Mobile massage, couples massage, pamper parties, corporate massage, hotel massage, pregnancy massage, ettalong beach, ettalong accommodation, airport park ing sydney, parking sydney
[login to view URL] - sexy panties, sexy lingerie, sexy underwear...
[login to view URL] (translated) - hair extensions, nail extensions, vehicle registration, cacti, cacti sales, search engine optimization, spy gadgets, chinchilla,
Only white hat and risk free methods and long term results, no spamming with links!