One of my biggest money saving strategies is mystery shopping. Not only do I get reimbursed for my purchases, I also get paid extra to do the shops. I try to gear my mystery shops towards things I actually need. Because it doesn't pay enough to make it a full time gig for me I just use it to save on things I need. For example my birthday is Thursday so I picked up a bar shop. Basically I get reimbursed for two alcoholic beverages, two non alcoholic beverages, and an appetizer. So my visit will be free, but I will also get paid $25 for submitting my shop. Not a bad deal for this birthday girl.