Make your relationship personal.

Ask customers about themselves and their family.

Delight them by remembering dates important to them like their anniversary (this could also be the date they first became your customer).

Over-deliver and surprise them with an extra bonus.

Do more of what you do best and expand on it.

Send them thank you notes, they may lead to referrals.

Surprise them with a gift.

Send them useful information about items that might interest them.

Reward them with a frequent buyer program.

For more tips like these, visit http://GetMoreROI.net and click on the blog tab.