Add some "ONSERTS" to your outgoing email or mail.

Well you’ve heard about inserts – what about onserts?

These work because your best business and best referrals will come from your past customers. Check out this example from NPC Solutions.

Onserts are offers originally used on newspapers.  I think they should be placed directly ON your invoices. If you send out lots of invoices by direct mail or email, why not throw an offer on there?

Everyone MUST read their invoices right? So what better time to up-sell, re-sell or cross-sell your best, most targeted list of your past customers? This is also a great place to offer a customer service survey or an opportunity for your clients to refer business and reap referral rewards.