Think of one medium to execute on, then come up with a ton of different ideas. I want to stretch myself to do this more. I like these, although this truck idea is overdone. But if your audience spends a lot of time on the roads this might be worth doing.
These trucks are a great example of how to push traditional advertising and make it something fresh and eye-catching. I think this might be concept work rather than actual ads, but the idea could be a great way to utilize semis, buses, and more.