Provide Advice That Pertains To The Product
A simple how-to guide can be a great opportunity to promote your products without directly advertising them. For instance, if you run a store that sells window cleaning supplies, you might provide a how-to guide for getting off stubborn dirt on a window. You can mention which products you would recommend, and then explain how the process works. People will still be able to benefit from the information whether they buy your products or not, but chances are they will trust you enough after reading your advice to work with the products you recommend. You are then more of an adviser and less of a salesperson.
Promote The Products That People Are Actually Looking For
If you notice that there is a high demand for a certain product on your website, show users similar products that they will be able to use with it. For instance, you could also promote items seasonally based on the demands that will be coming for a certain time of year. Christmas time is usually a high-demand season for special gadgets, wrapping paper, family recipes, etc.. You can promote products according to the time of year.
Focus On The User, Not Your Business
The word “you” is highly effective in sales writing. Rather than saying “we offer something special,” say “you can take advantage of this special offer.” The meaning is still the same, but the reader identifies with the statements using the term you more than they would you with a statement using the term we. When users feel like they are the ones to benefit from the offer, you will have a much higher success rate with sale.