Customer reviews are the "social proof" that encourages people to join in on something. It's one thing for you to tell people to sign up for a campaign, but it's another thing for your happiest customers to say it too. Publish your best reviews from communities like Yelp right to your website. This adds genuine value to your landing pages when people are on the fence about submitting their contact information.
Your best bet will be to give away something that’s valuable to your target market; for instance, a high-value digital asset on a niche topic. You can give away products (we’ve all seen contests where the prize is a free iPad or gift certificates), however this strategy often leads to entrants who are more interested in the money than in what you have to offer.
Of course, implementing this isn't easy. You need to first develop your stories, then decide on how you're going to convey those stories and at what drip-rate. For example, your first email or two might go out on the day they first signup, then one email per day might go out afterwards. How much of that will be story-based and how much will be pitches?
What are email funnels
Just like issuing a dare, offering a challenge motivates people to step up and do things they might not do otherwise; like pour a bucket of ice water over their head. The challenge can include some sort of giveaway or reward for showing up logging in or commenting on posts for a certain number of days or some other type of challenge, but should certainly require an email address to enter.
How can I increase my website speed on mobile
You might be doing all the right things to generate leads -- landing pages, gated content, contests, and more. The problem might be that the design or copy itself isn't driving the engagement you need. A/B test (also known as "split test") different aspects of your list-building campaigns with different versions of the same content. This includes the call-to-action text, the color of the gated offer, the time of day you're posting to social media, and even where on your website these signup forms are placed. Sometimes a small change can drive hundreds more conversions.