Search engine placement is more of an art than a science. Do a search for Search Engine Optimization or SEO, look for the several different sites that have newsletters and subscribe to a few. There is no way to guarantee a top placement position on Google, unless you pay for placement using their Adwords system. Getting a high placement takes lots of time, means constantly changing and updating your site, keeping a constant eye on your competition who are trying to do the same exact thing, and to be honest a little bit of luck.
But with that said the main things to do for Google placement are to make sure your keywords are used frequently in the first 200 words of the page. Make sure that there is no bad code that could be blocking the search engines from properly indexing your site (such as using white type on a white background, or repeating your keyword over and over). Make sure your site is written in plain English with the keyword scattered throughout the text. If you read the text out loud and it doesn't sound like how someone would normally talk, it will get you a lower placement. Frequently setting up bulleted lists will help. Aim for only one keyword targeted per page. If you want different keywords for the same page, you should break that up into several pages, each page focusing on only one keyword.
You also should try and get other sites to link to your site, but these links should be from highly ranked sites, not link farms. It can take you years to get the quality links you need this way. You have to "sell" each site that you want a link from on the idea that putting a link to your site from their site is a good idea. Don't ever be tempted to add your link to one of the many link farms out their. There are lots of companies who allow anyone to place a link on their site. Google knows this trick and it will send your page to the bottom of the stack.
Again, this is more of an art than a science and you will need to do lots of continuing research and work on your site to get and keep a high search engine placement.
I have several articles in my articles section on search engine optimization
http://www.howtogurus.com/free-articles.html
