Check your emails from Starbucks with the subject “Your rewards routing starts today”. Starbucks routinely sends promotional emails out to earn bonus stars. The more stars you earn, the more free food and drinks you earn as well. The emails are somewhat targeted as the exact details of the promotion may be different.
If I earn a star 2 days in a row, I earn 2 bonus stars – 4 days in a row, earns 4 bonus stars and 6 days in a row earns 6 bonus stars. Yours may be different. This is an easy way to get 12 stars – which is enough for free a food or drink item. Even if you don’t like the coffee at Starbucks, they also have food items so don’t pass this up.
There are multiple ways to manufacture free stars so this shouldn’t even cost anything except for your time (& gas) to get to Starbucks. These methods are easily found, but let me know if you want to know.