A refer-a-friend program is one of the well-known growth hacking tips.
All you need to do is offer incentives to the users who referred you and to the ones that come via your referral.
Now, the rewards you offer should be relevant to the customers. Today, it is not really a problem to provide customer-specific discounts on items that the customers have expressed interest in. But, discounts are not – and should not – be your only tactic, because offering too many items at a reduced price too frequently creates expectations that everything should be discounted all the time.
Before launching a referral program, you should know exactly what you plan to do with new customers, mainly, what you’ll do to turn them into returning customers. Remember, the refer-a-friend program is not a strategy; it’s a tactic. So plan your next touchpoints – like packaging insertions or email follow-ups and other nifty things.