Dear Snap-D: We are a general-practice law firm with several practice areas. What is the best way to describe what we do to potential clients without sounding like a “jack of all trades?” A: Jack-of-all-trade lawyers who market to everyone lose focus — no question about it.The most effective marketing is done when you direct all your marketing efforts toward a target group. You need to find that niche that has a need and work hard and diligently to become a big, highly visible fish. For lawyers, this is …