I use these hourglasses to measure out specific activities in my workday in an unobtrusive, soothing fashion. The 6-minute hourglass reminds me to get up, walk around and focus on mid-to-long-distance objects and keeps my longer breaks on track. The smaller hourglass helps me measure out Pomodoro cycles, email-checking periods, short breaks, and quick brainstorming sessions.
What productivity tools do you use? Do you prefer analog or digital solutions?