Most SaaS signup forms require user information like name and email address – but why stop there? You can experiment with viral signup forms, and instead of asking for standard contact information, ask your new signees to share the signup form with a couple of friends.

As long as you make it easy to make the referrals (adding social media integration, and only asking for 2-3 shares), there’s a good chance you’ll see a big net gain in signups.