Be a squeaky wheel. Thank your clients for their business. If you haven't heard from them in a while, get an e-mail or phone call in front of them. If they refer you to someone new, definitely thank them for that.
Don't just be a PDF attached to an e-mail. When was the last time you dropped by your client's office? Do you go to mortgage broker association and other group meetings where your clients are likely to be? Even when you can't have face time, consider sending holiday greetings and birthday wishes.
is a tool lots of appraisers use to make their connections with clients more personal. You can identify a list of contacts you want to get a regular "campaign" of e-mails, tell it which ones you want them to get when, click it and forget it. You stay front of mind with your clients but stay free to do what they hire you to do.
Consider a "customer rewards" program — formal or (more likely) informal. Now, you need to be careful. It's unethical, as you know, to give a client or potential client a gift to induce them to order their next appraisal from you. That's why you need to look at this as relationship maintenance. You're not bribing them to order from you again, you're thanking them for their business in the past.
Some appraisers are careful that thank-yous they send to clients include something for everyone in the office, not just the decisionmaker. Buckets of Boy Scout popcorn, for example, or a nice plant for the reception area. However you do it, remembering your highest-volume clients goes a long way.
Ask for their feedback. Do you assume you know why your clients keep coming back? Do you figure you're a nice guy or gal, your fees aren't outrageous and you deliver your reports on time? When you want to know what makes your clients choose to do business with you — and you need to know, to keep them — it doesn't make much sense to ask yourself. Ask them.
Is turn time really the most important thing? Do they like electronic delivery? Do they want someone who's ultra-responsive to requests? Ask, and they'll tell you. Then you can concentrate on doing better at what your clients think you do best.
Don't ignore the low to the ground stuff. You might hear that the first, best way to keep clients is by doing good work, and that's true. You're going to do your best work anyway. But there are things too many service providers let slip that if you are disciplined about, you'll leverage toward keeping a steady flow of business.
Be responsive to client requests. Deliver work product and other requested information or materials on time. Be polite on the phone and in e-mail. If you let basics like this slip, a plant for the reception area isn't likely to win your client over.