One of the biggest challenges when advertising a product, is to come up with an idea that is not obvious, but still is clever enough to deliver the message your client wants. When you do that and still manage to be funny, you hit the jackpot.
Here are some examples of clever advertising and how a simple idea might be just the right one to go with. Remember, complex might not be best way, so stick to simple ideas... most times less is more! Found these on Flickr. Enjoy!