Problem

You need to make pages memorable to both visitors and search engines.

Solution

Design straightforward URLs and do not use frames.

Discussion

Your URLs should be short enough so that people can write them down. Do not use frames. If pages are database driven, do not use a GET query with a question mark in the URL. Rather, cloak the arguments by using the path environment variable. Add alt tags to important images.

These techniques do not assure high rankings in search engines, but they will ensure that the pages will be easily accessible to search engines and easily shared and written down by people.