1. Focus on great customer service and the reviews will follow. It is bad form to ask for a "great review" during the session. I have actually had this happen a couple of times. Can you imagine the Four Seasons asking as you are checking out "Can you please give us a great review?!?" Instead, it is more like you get an email from them afterwards saying "how much they enjoyed me staying there and hope to see me again soon, and to please let them know if there is anything that they can improve on." Once I say it was "fabulous" I may get back they are "so pleased to hear the complement and that, if I have the time, they would appreciate a review that lets others know of my experience." I would actually stay away from quid-pro-quo of discounts/specials for good reviews. The Four Seasons would never want to be accused of paying for good reviews.
2. The tough part is to remove the feeling of a review being personal. I have met a lot of girls that feel they just can't read them... and get so hurt when they see a really negative one. I get it... How can you not take it personally when such an incredibly intimate experience is cast in a bad light in black and white forever? I think you have to view it as one person's impression of one experience - it does not reflect on you as a person. Even the Four Seasons will get some knucklehead who gives a terrible review every now and then - they know they can not control that. What the concierge/manager does - says he is so sorry to hear that their experience fell short of expectations and the satisfaction they hope all their clients get. And then he makes a genuine comment about how they hope to get it better. They may even say hey - we want to get it right and will give you a 20% discount and hope you give us another chance. Kind of hard to stay mad, right? Heck - I may even take them up on it and may even rewrite the review. The important point is that the concierge or manager of the property does not take it personally. In fact, they know they are outstanding, but they also realize there is always room for growth - and that is how the get to be the best -- always striving for improvement and excellence.
3. Finally, be comfortable with yourself and trust that your scores over time will reflect reality. If they had scores for guys, I would probably be 6 for looks and like a 4 for performance. But, hell - I believe I am the best 6/4 you will ever experience!

And that is ultimately what you want - a situation where expectations can only be met (and hopefully surpassed). I have seen a couple girls that have tried to manufacture unrealistic scores - this only can last so long until a guy comes in with expectations so different from reality that he torpedos her scores. The truth is that there is a place and budget for all different looks, styles, etc. Embrace what is you and love it! If you love yourself, love the person you are with, and love the experience - it is hard for that not to create a very special time... the type that gets great reviews!