Observe and draw reflections from your surroundings. Draw the reflection of a cup in a polished tabletop, and the reflected highlights in a drinking glass. Note how the highlight describes the form of the glass.
Look out a window and observe where you can see your own reflection.
Find a large body of water and note how close to your point of view you can see into it, and at what point, farther away, you begin to see reflection.
To help confirm your understanding, draw your observations.