Of course you wouldn’t! You’d find a nice patch of fertile land and sow them successfully there?
So why not the same with your sales activity? You probably have plenty of data about where and what markets your current clients are in - analyse it! In doing this you potentially will identify the fertile ground (markets) or maybe ones that your product/services have not been exposed to yet.
Potential result = focus in the right place and more sales at no extra cost. You don’t have to re-invent the wheel!