Use a descriptive title. Many site owners forget to name their pages, or name them something generic, such as "Welcome Page." Search engines do use title descriptions in their rankings, so make sure you are as descriptive as possible, without going overboard. Make sure it is usable for your viewers and the search engines.
Do not use any type of pop-ups. It's annoying to visit a website and get ambushed with a lot of pop-up ads. The majority of people will leave a site if it contains pop-ups, even if these sites are very large ones. You can avoid losing customers and visitors, by simply refusing to allow pop-up ads on your website. Is your host making you use pop-ups? Time for a new host.
Make sure everything is easy to locate on your website. Spend some serious thought on how everything on your site will be laid out. When content is randomly thrown on your site with little thought to the layout, you are making things harder for the people whose use of your site ensures your online success - your site visitors.
Provide a navigation menu on every page of your site. While this menu does not have to link every single page of your site, as this could be an exhaustive list if you have a very large site, it should provide links to the main pages. This ensures that your visitors do not have to return to the home page and start completely over when it is not necessary.
Make sure your website uses a consistent font throughout. Some websites change fonts willy-nilly without any design reason to do so. This makes the content difficult to process for visitors. Most websites, especially business websites, will do just fine sticking to basic fonts like Arial, Veranda, or even Times New Roman.
Watch the amount of flashy multimedia that is on your site. Don't overdo it with a bunch of "extras". Flash graphics and multimedia may appear enticing, but these may make it difficult for visitors to find the desired information from the site, particularly if they're viewing your site from a non-Flash compatible device.
Never bite off more than you can chew by attempting to design multiple sites at once. You should keep things simple by only working on one site at a time. Even if you do have some web design skills, you may get crossed up with your projects, or one of your sites may suffer neglect. Just take things one at a time.
Now that you've learned some of the ins and outs of web design, you should, hopefully, be a bit more eager to use it to your advantage and gain a reasonable amount of profit through it. Web design is the future and now you have a good idea of how to become good at it. Use this to your advantage and become successful for years to come.