Mystery shopping locally has alway seemed like a burden. Too much research, hassle, and documentation for such small rewards. However, there might be opportunities for travel mystery shoppers. Brought ot my attention by The Professional Hobo's blog, here is the link: http://www.evaluateitbysqm.com/EvaluateIt/
I read through the site and it appears there is an estimated 50% discount on travel and dining. I completed the brief survey to apply. I'm not convinced it will be worth my time, but I'm willing to test it out this month.