If you're searching for the most effective way to acquire customers or get them to love your brand, look no further than email newsletters. McKinsey research found that email is 40 times more effective than social campaigns for growing your business. Customers who purchase through your newsletter also spend 17 percent more than those who don't.

How do you turn your email newsletter into something your customers love seeing hit their inbox, instead of sending them running for the nearest spam button or unsubscribe link? Here's a look at four fantastic newsletters that are doing it right and what you can learn from their examples.
1. theSkimm
2. goop
3. Industry Dive
4. "Level Up" by Forbes