If you feel like doing a cartel of style Retro or you are commissioned to design an advertising campaign and you want inspiration of what is done in the 90 years.
Here is a link to 20 billboards from the 90s, that although it seems that not so many years have passed (and in reality it has not been so many years) Artwork and the focus of advertising campaigns Yes, they have changed a lot since now the era of the internet and the 2.0 web It floods everything, something that did not happen about 10 years ago ...
Source | 20 billboards from the 90s