The best pictures show products in use. Photographs become more difficult in one-color printing, and sketches or black and white photos might work better. Never use 20 or 30 words in a sentence. Use 5 to 15 words. Use action verbs.
Action verbs are exciting and interesting to read.
Passive verbs are boring. A quick test for good advertising is to look at personal pronouns. Focus on the need of your customer and how you fill it. If you are marketing directly from your home, you will want to put up a road sign identifying your location and the product you sell. When designing road signs, remember that fancy typeface cannot be read at 60 miles per hour.