Shock the viewer into awareness. Keep it simple. Cut out all extraneous words and pictures, and concentrate on the essentials. Use no more than seven words of copy and one picture. Personalize when you can.
Personalized posters are practical, even for a short runs.
Look for human, emotional content for memorability. It can be an entertainment medium for travelers who are hungry or bored. Use color for readability. The most readable combination is black on yellow. Other combinations may gain more attention, but stay with primary colors-and stay away from reverse.