Stop narrowing your ICP down to one industry before you have any data. New agency owners do this constantly. They pick a niche off a course, go all in, and wonder why the emails aren't landing. Here's what recommend instead. Build the exclusion list first. Remove the industries you genuinely don't want. Hate working with legal? Cut legal. Everything else stays open. That keeps your total addressable market wide while you're still figuring out what actually resonates. Then send the broad campaign. Same offer, every industry that's left. Give it two months. By then the replies tell you where the money is. One or two industries will be answering way more than the rest. Now you narrow. Double down on the niche that's replying. Write copy just for them. Build the next list around them. You didn't guess the niche. The market picked it for you, and you've got the reply data to prove it. Which industry ended up being your niche without you planning it?