Building an extensive email list is an important first step toward acquiring customers, but if users are not expecting to be “sold to,” a cold sales email can scare them off. The Pretargeting Hack warms users up to your product before hitting them with that first email blast.

Facebook and Twitter both offer powerful pretargeting services. After signing up, you can upload your list of emails. The platform then populates each contact’s Facebook or Twitter page with ads for your product.

To pretarget using Facebook, you’ll want to utilize their Custom Audiences service. For Twitter, it’s Tailored Audiences.