Open the review forum in the City (where the review took place) that matches your session (Independent, Agency or Strip Club, etc...).
In that forum is a button labeled "New Review" near the left portion of the page about 3 inches down from top.
Fill out the template and be sure to thoroughly describe the session in The Rest Of the Story. All approved reviews earn six weeks of free Premium Access.
Here are a couple of links for more info on writing a quality review and obtaining 6 weeks free Premium Access:
http://www.eccie.net/showthread.php?t=24105
http://www.eccie.net/showthread.php?t=185588