Vegas 4 Locals, Las Vegas Leisure Guide and the American Casino Guide (costs $13) are a few other great resource for finding printable coupons for Vegas. At the moment, the American Casino Guide has 2-1's free play and free spa.
I buy the LVA Reward Booklet and American Casino Guide every year and I too would recommend them, especially the LVA booklet because it has some coupons you dont get in the other booklets such as Matchplays for the IP.