Maintaining relationships goes way beyond organizing your database. Excellent service is about making people feel valued, and there are few ways more effective than personal outreach. Taking the time to compose a note to someone is meaningful. It's a level of effort that will make a memorable impression. I like to send handwritten cards on custom stationery that shows the recipient they are not simply a generic name to me - they are worth every minute of my attention.
Papier Stationery is a great resource for easy-to-customize and high-quality stationery. There's a wide variety of colors and embellishments so that you can create notecards that reflect your brand. Check out Papier if you are in the market for personal stationery. This is also a great gift for peers and clients - taking the time to personalize notecards with your client's name will show that you are thoughtful about the details.