Think about your visitors. They came looking for information (or entertainment.) But they are looking for their information not your information. They are looking for answers to their questions, not answers to your questions. If you sell a product or service, your website must help them decide what to buy, before it can persuade them to buy your product or service.
Think about yourself too. What questions are you being asked over and over? Wouldn't you like to put the answers on your own website so you won't have to answer them as often? What misunderstandings do people have about your business or organization, which you could easily lay to rest if they would only ask? By visiting your website, they show they are open to asking you questions. Some of them may not read all your answers, but at least your website can provide them. Don't let them feel your answer has shortchanged them.
When you answer a question, how long should the answer be? Try this: give a quick answer on your main page, a sentence or less, then link to more complete answers on other pages. Let your visitors get their work done as soon as they know enough to do it, but provide more information for them if they need it. If they need to finish quickly and leave, let them. But if they want to stay and visit for a while, make them feel welcome.
You have something important to say; find what's keeping you from saying it. Find someone you feel comfortable with saying the kind of things that belong on your website - maybe a client or a younger friend. Then say it. Imagine that you're writing to them. If you are nervous about writing a webpage, are you nervous writing an email? If not, say it in an email, and then edit your email for your web page. Or have someone else do it. Not as nervous about talking on the phone? Record your phone conversation and type it up. More comfortable talking in person? Run a tape recorder as you're talking. Uncomfortable about tape recorders? Have someone record you without your knowing it. Still not sure about this? Get someone else to interview you about your work. Or to interview someone who knows you, maybe a favorite client, asking them about your work. Whatever it takes to get the words onto your web page.