You don't want to give away valuable information which could potentially devalue your business, for example trade secrets and, very importantly, you don't want to waste your time. (entrepreneur.com)
Example trade booksellers include superstores, chain stores, independent booksellers, and online retailers. (millcitypress.net)
Here are step by step instructions (with a live example trade) on how to make money with covered calls... (borntosell.com)