Creating quality content for your visitors is crucial. However, proper navigation and site structure can be just as important. The search engines cannot fully index your site if it is not properly linked together. Every single page on your web site should be no more than 2 clicks away from the homepage. Before you create your site, decide on which internal pages are the most important in terms of ranking. Once you have gathered 15-20 of your most important pages, you will need to place them at the side and bottom navigation of each one of your web pages. This will ensure that the most possible pagerank is transferred to those pages. Each of these links should contain descriptive anchor text, preferably targeted keyword phrases that you are wanting to rank highly for. You should never make your web site visitors guess what's on the other end with a link that says, 'click here'. Be as descriptive as possible and your visitors will thank you.