This means the progression from one page to another should be as simple and direct as possible, and follows a logical progression. An example of something that does not have linear logic is English. Consider all the rules of grammar, and this is a perfect illustration. If you are going to use hyper links, which Gen-X Graphics avoids like poison, make sure they look nice. We never waste a users time by directing them to a site which is not operational.
Images can enhance a site, or detract from a site, based on how they are used.
Basically, a little salt spices up a meal, too much and no one wants to eat it. Plastering stickers all over them ruins them. Another problem with images is that they slow down the download. Especially if I've wasted several minutes before getting to any navigational device. Had I not wanted to see the pages, I probably would have left the site.