Factors,attracting our attention during watching advertisement are as following :
1. Size - big items are easier to notice for our eyes and pay attention to them
2. Contrast - comparison of two products is likely to highlight advantages or disadvantages of one of them and influence its better perception. Look at this funny ad ;)
http://www.youtube.com/watch?v=muH-zcOYnFc&feature=related3.Repetition- the more often a product is shown, the more likely it will be remebered.
4. Movement - Lively M&M's ;D
http://www.youtube.com/watch?v=OrHcSoWtsy8&feature=related
5. Colours of packaging of the product - create an imagination about product, for example pink bottle is strongly regarded as a packaging of and article kind for women, while black for instance deodorant is rather perceived as a cosmetic for men. These dependencies are used in promotional campaigns.
And...:D http://www.youtube.com/watch?v=_2Hv1IhUh_8&feature=response_watch
6.Shape of packaging of the product - can distinguish the product from the competition, give it a unique character and make the customer will want to buy it to feel more unique itself, for example pefumes or bath oils.