This is a true a statement as you will ever read.

It is taught in sales, service, management, and every other aspect of business and life.  Whoever is is contact with a person or organization always has a stronger relationship than those with little contact.

Translation:  Contact you clients ALL THE TIME.

Contact them to say hi.  Contact them to ask how they are doing.  Contact them to ask how your last service visit went.  Contact them to tell them about developments and offerings from your company.  Contact them by just sending them an interesting article related to their industry.  Contact them by sending them information about a new technology that will soon arrive.  Contact them, contact them, contact them.  And after you do, contact them again.

Have I made my point?

-Zachary M. Morvik