There are a few things we always do at Costco. The first is to try as many samples as we can (hopefully without alienating any of the kind people giving them out). Once we're fueled up from our sample snacks, we make a beeline to the Costco bakery to check out the new desserts they have in stock (tiramisu cheesecake, anyone?), then to the Costco deli to see what heat-and-eat meals they have on offer for busy weeknights. Finally, even if we wind up empty-handed in the other areas of the…