You develop an avatar or model of who your ideal client looks like, then try to find out who they are.
Then you call them. On the telephone. You drop by and introduce yourself, you do sales.
In my experience, chambers of commerce and business mixer events are full of mutual fund, insurance and real estate salespeople. Go talk to people who can use your services.
I've been involved in B2B sales my whole life. If you'd like to discuss your particular case, please arrange a call.