You can create a steady stream of new business by becoming a leader in an organization of clients.
Notice I said an organization of clients, not a bar association. The idea is for you to be the only lawyer in a room full of potential clients.
The way to pick an organization is to ask your best clients what meetings they go to. Don't make the mistake of joining a lot of organizations – just pick one and go deep. Be sure to go to all the meetings and become a regular.
When the timing feels right, ask the President if he has any chores you can do. The president will assign you some minor task and if you do a good job, he'll give you an appointment. If you get on the newsletter, your goal is to become the editor. If you get on the program committee, your goal is to become the chair.
I was in a group and the President asked me to take all the calls about where the next meeting was going to be. I responded by creating a website for the group, and I was soon working with all the key people in the organization.
When you become a leader, everybody in the group will know who you are, and the new matters will follow.