Spend just a few minutes taking notes on some of the people you've seen since the last lesson, and the details you might use to describe them.  If you've already done this, you can reread your notes and decide if there's anything you want to add.

I went to the doctor by bus.

The bus driver was a tall, burly man, with beefy hands. His skin was dark and rough like sandpaper. He wore sunglasses so as to hide the intention of his soul.  He had a beard that was shaped like a ice cream cone.

The receptionist's hair was black as the night, short and had a a crest just like a cockatiel.

When the doctor swooped in, I saw the he was birdlike, thin with long legs like a flamingo with glasses.