Apart from videos, students absolutely love the “Keep calm and …” You can also create #memes ! Talk about being modern!
Here is an awesome site to create your own #memes and you can also use it to create #motivational posters.
Having posters and important vocabulary items, structures and examples, or images are a great way of building a literate classroom. If students get bored or their minds wander on to unknown places during their other lessons, they will look at your posters and they will internalise the motivational phrases, structures, vocabulary and all that you wish to hang on the walls.