One thing I would add is that “giveaways” can also be in the form of social media (not just physical giveaways such as coffee), i.e., participating in conversations through the platforms you’ve outlined here. For example, retweeting interesting posts by your Twitter followers (including those that are not about your coffee shop), posting comments on others’ Facebook pages and/or other blogs, i.e., using social media to reach out and engage with people beyond posting and tweeting [exclusively] about your coffee and/or coffee shop. Obviously, these conversations have to represent genuine interest and engagement to be most effective.