If not much is coming around to you maybe it's because not much is going around from you. This strategy works like carpet bombing in the Persian Gulf War. The constant bombardment softened up the battlefield for the ground troops. They feel like you really care and have added value to their life. So when you do call with a product recommendation or request for referrals you are more likely to meet with success.
Newsletters are okay, but remember, few people have time to read an entire newsletter.
Many will take the time to read one article if the headline catches their attention. If you use a newsletter, make it short and easy to read with short articles. There are ways to do this without a database management system and computer. But, frankly, if you don't understand how crazy it is to try to build and maintain a client base without a computer you probably don't understand the value of the strategy you are reading about now anyway. The only place where success comes before work is in the dictionary.