#1 Keep it Simple
#2 Appreciate the importance of good visuals.
Give the audience attractive holistic images, good colors, and clarity. Online ads represent a melding of the qualities of a static print ad and the motion of a television commercial.
All colors are not created equal: The most effective colors are blue, golden, yellow, green, red and black(esp when used with a white background).
Eye Contact: Position the model in the ad so that he/she makes a direct eye contact with the reader.
#3 Get to the point quickly.
#4 Select the format that will tell your story with greatest power
#5 Enhance Eligibility
#6 Avoid Ambuiguity
#7 Emphasize consumer benefits.