I suggest a sharp technique which I personally follow. i.e. AIDA.
Like the four pillars of good marketing, AIDA stands for:
Here is the simple protocol to follow AIDA.
Divide the total number of words by 4 and specify each section for Attraction, Interest, Desire, and Action respectively. For example, If I have to write a 1000 word article for a product, in the first 250-word paragraph, I will just focus on to get the attention of my reader either by making an awkward question or by setting up a situation that can deeply engage the reader.
In the next 250-words, you just have to continue building the interest of your reader either by listing the advantages of purchasing the product or disadvantages of not buying it.
For the next section, you have to hit the weak point of your client building his desire to purchase the product.
Finally, call him to the action in the most polite way. For example, You can say, "Feel free to have a free consultation". You can also make a punching line by giving your customer a tip related to the product.
Following this technique, you will not only save your time but create content that will be worthy enough to get you positive responses.