Many people equate writing with sitting down, staring into space until an idea magically appears in their mind, and then creating the next Pulitzer Prize-winning work. Not true.
There is no more secret sauce for the writing sandwich. Just as grabbing bread and filling constitutes the needed ingredients for an actual sandwich, the only materials needed to write are knowledge of words and a means to capture and save those words.
Just write. Let the words flow like a mountain stream that meanders from the tundra to the valley (like the picture above that I recently took in Spain). Keep your writing as broad or as focused as you want. Think binoculars versus magnifying glass. Both enlarge objects, but one takes in a broad spectrum whereas the other focuses on a particular object.
How does writing help with sales? Good writing conveys a message that informs, relaxes, and reassures the reader/potential customer. Writing short and sweet blurbs on Twitter allows you to show a more relaxed side to yourself while at the same time disseminating a useful message to your followers. (Research shows a 27% increase in the click-through rate for companies that use Twitter.) And referencing a landing page allows you to have a 24/7 information gathering service. Landing pages are your digital sales force; make them contain the highest-quality content with the most appeal that you can.
So just write whatever, whenever the mood strikes you. Soon you’ll find yourself better able to communicate to your customers and your target audience. You have my word on it.