What should I put on my website?

Your website should be an extension of your selling strategy.  You should know your customer, and their decision-making process so well that when you send a potential customer to your website, it will make perfect sense for them to progress to the next step in their buying process. 

People spend a lot of time, energy and money trying to figure out how to optimize their website on Google, but Google has always optimized the sites that have the best user experience and that is unlikely to change.  Look at the websites of your competition.  Copy the things you think they do well but make sure you are still being true to your unique selling proposition. 

Most websites have a homepage, an about page, a services page and a contact page.  Use this format and add other pages as you see fit.