If the sign outside your office door says “President” and “Janitor,” then you're probably kept pretty busy with your workload: satisfying customers, balancing the books, and mopping up at the end of the day. For many people, when you're doing all of the jobs yourself, your door also says “IT department” which may mean that you're designing and maintaining your own website.
Websites can be built from scratch with good knowledge of code or they can be built with some of the good programs out there like Macromedia's Dreamweaver or Microsoft's Frontpage.
Those programs may be enough for you. But if they're not, I've just been recommended a great program at http://www.evrsoft.com/. They have a free version and a paid version. I've just been trying out the free version lately and am really impressed by it. I'm not a coding master by any means but I know my way around html and I've actually had a lot of fun designing websites with it. And what I like about the program is that you can design them in html or you can design them in WYSIWYG (“what you see is what you get).
If you're looking to expand your web design know-how, check out Evrsoft's program for yourself.