Sun Min Kimes, a behind-the-counter barista at a Starbucks in Ashburn, Virginia has written a guest post on the Fortune magazine blog “Postcards” that offers advice for the CEO of her company, Howard Schultz. Starbucks has been going through some lean times lately, and are trying everything from removing their branding from their coffee shops to… well… making their employees put a Mr. Potato Head toy together over and over again.