Instead of starting from scratch when making a new motion piece I like to use filmed footage and add stuff onto it. I think it's a great and fast way of learning new tools and presets in After Effects.
In this tutorial I will go through what I added to my birdhouse footage to make it look like an ad or vignette for a tv breakfast show.
Things I have used are different kinds of filters, a dark vignette, motion tracking to the text and an animated speech bubble. The speech bubble is made out of three similar versions in Illustrator and then put together in a loop in After Effects. That gives it a more dynamic and analogue look to it.