Sometimes, when I am out on a coupon run, I cross paths with the Walgreens Yoda. The Walgreens Yoda is a friend who eats, breaths, lives for couponing at Walgreens. He basically knows all the deals and is usually armed with hundreds (sometimes thousands) of dollars of Register Rewards stuffed in thick envelops. So do I ask him for inside tips on the latest Walgreens deals? Nope. That question is strictly for amateurs since both Yoda and myself know exactly what the good deals are thanks to the many Walgreens blogs and forums available on the Web. The question...