In August I'm going to be rejoining the English Association for Snooker and Billiards as well as the Kent Snooker Association for the 1st time with the intentions of playing as many tournaments as possible. I'm also going to be playing for the Kent BlackBall Pool Team in the New Year.
Is this worth adding something about me being a member of these Associations, would it make me look more professional as a business?
Including this would definitely add credibility and show that you are a professional in the sport. Including links to these associations on your website (and links from the association websites back to yours) will help its search rankings. Would suggest posting your rejoining comment and details of each tournament you attend as blogs on your website's blog page, linked into Twitter.