In the broadest terms a SEO (Search Engine Optimizer) cannot make promises. Promises such as “I guarantee you top 10 on Google in 1 month” are impossible no one can guarantee what will happen on Google. No company has a special relationship with Google and Google does not discuss key phrase positions with companies. An SEO firm or individual can tell you what they will do to promote your website and these will be concrete traceable things that you yourself can check on. There are no secret procedures.
The most important things to do are submit a site map to Google, develop interesting relevant content frequently, and write relevant title and sub-titles. It is good to get inbound links but these should be from visitors who enjoy your web site; not purchased, this can get your web site banned from Google.
Read the Webmaster guidelines at http://www.google.com/support/webmasters/