Choose a current or recent brand’s campaign. Find an ad from that campaign, or an image from a campaign ad.
In your mind, think of what the Creative Brief for that campaign would have said.
Working on the idea of repeatability, concept one or two new ads that could seamlessly work with the existing campaign.
Next, working with extendability, generate two or three new media placements or touch points for the campaign. Consider the executional opportunities for these new placements.
Be prepared to explain your rationale for each execution and placement.