[ChopSuey]

Remove Session IDs.
I can give advice for PHP users, ASP and CF users should do their own research on exactly how to remove these. With PHP, if the user does not support cookies, the Session ID is automatically inserted into the URL, as a way of maintaining state between pages. Most search engines don't support cookies, which means they get a different PHPSESSID in the URL every time they visit - this leads to very ugly indexing.
There is no ideal solution to this, so I have to compromise. When sessions are a requirement for the website, I would rather lose a small number of visitors who don't have cookies, than put up with PHPSESSID in my search engine listings (and potentially lose a lot more visitors).

This will mean visitors with cookies turned off won't be able to use any features of your site that use sessions, eg logging in, or remembering form data etc.

I guess Session URL is helpful, you dont need to "remove" it.