A new line is the cheapest growth available to most small businesses. You already have the customers, the premises and the reputation, so you are not buying attention, which is the expensive part. Selling one more thing to people who already trust you beats finding new people at almost any scale.

It is also where effort quietly disappears. A line that sells a little, needs its own stock, its own process and its own explaining, and never grows, costs more than it earns for years because nobody ever sits down and kills it.

Know what problem the new line solves for a customer you already have. A line that exists because it seemed like a good idea is the kind that lingers; a line that answers something customers keep asking for tends to sell itself.

Decide in advance what success looks like and by when, as a number. Deciding afterwards means you will find a way to call whatever happened a success.