We all know that writing a subject line for your email can be harder than writing the email itself, especially when you’re trying to get someone’s attention. How exactly should you title your carefully crafted email to make sure it actually gets opened?

After an extensive study, researchers from Carnegie Mellon have found that the most effective emails have subject lines that appeal to one of two things: utility or curiosity.

So what does this mean for your next email? Check out the quick video below to see how you can craft winning subject lines every time.