Don’t have time to hit the gym today? No worries. Believe it or not, there is a solution to missing a workout: get moving. You burn tons of calories by living an active lifestyle and eating well already. But just to prove it, we tapped into an extensive study from Harvard Medical School that measured how many calories a 185-lb guy burns over a 30-minute period during routine activities. We also used a Mayo Clinic calorie calculator for ideas of our own (think: climbing the Subway stairs). The result? Presenting: M&F’s ultimate list of the 30 most surprising ways you can zap fat fast, every day — without even realizing it.