Daryl T. Logullo observes that
most companies spend 80% of their promotion dollars
on outbound marketing and advertising.
The remaining 20% is spent on current customers.
He suggests flipping this allocation
for a better return
(as the advertising arena is crowded).
The three simple actions he recommends
(educating existing customers about your product offerings,
informing them that you wish to grow, and
then rewarding them for referrals)
will grow your business.
On the same topic,
Troy White suggests reminding existing customers
about all the products you offer
(his fruit stand method).