Start with what the rules allow, then build the routine
Every other industry can begin a marketing conversation with tactics. A law firm cannot. Professional conduct rules restrict how advocates may advertise and solicit work, and the position varies by jurisdiction and by the bar that regulates the practice. That is not a reason to do nothing; it is a reason to build the routine around the activity that is clearly permitted and genuinely effective, which in most firms is communication with existing clients, structured relationships with referral professionals, and proper follow-through on the work already in hand.
The firms that grow steadily are rarely the ones with the most visible marketing. They are the ones where a client is told what happened at a hearing before they have to ask, where a retainer is renewed a month before it expires, where a fee proposal is followed up on the eleventh day rather than never, and where the accountant who sent three matters last year is kept informed about all three. All of that is automatable in the sense that matters, and none of it is advertising.