Ghirardelli chocolate squares are tasty suckers. Individually wrapped in gold foil, they are culled from either white, milk, or dark cocoa and come filled with gooey additions such as caramel, raspberry, peanut butter, and mint. Best part: You get a free sample upon entering Ghirardelli Chocolate Company on Lincoln Road (bonus: the heavily air-conditioned ice cream/chocolate shop provides a restorative blast of chill for overheated Lincoln Road stragglers). Just seek out the worker with a tray of the sweet treats, and she or he will surely ask if you'd like one. They're so good you might consider sneaking back a short while later in a makeshift disguise, or perhaps you'll want to purchase some (that's sort of the idea). A 15-pack costs $7.95, so math whizzes can figure out the monetary value of this freebie.