I love Ghirardelli Chocolate!! We have a store in downtown Chicago that is on my route to class, and I sometimes go in there and get free samples. My favorite kind of candy there is the caramel-filled chocolate bars. I also love the peppermint bark that they have every year during the holidays. If you haven't tried it, I highly recommend it!
I have a whole system worked out to getting samples. What I do is go into the store and get the sample from the friendly greeter at the door. I then pretend to be looking around at the merchndise, and then I sneak out the door when the greeter is helping another customer so that they're not offended when I don't buy anything. It's not a very good system, but it works. I know they don't care if I buy anything, but I don't want to create an awkward situation.
Another Ghirardelli product that I love is their brownie mix. It takes 5 minutes to make, but the brownies are amazing!