i find that even if using a zoom lens should still try to move around to change composition instead of just zooming in and out. moving changes perspective and affects the relationship between different objects in the viewfinder. this encourages us to think more about background and composition, instead of just zoom in, put the main subject at a 1/3 position and snap.
Hi Paul. I use zooms for casual shoots. To challenge myself I use primes.
I find that using prime lenses is a great way to learn about a particular focal length (when and how best to use a partical focal length).
Let's say I only have a 24mm with me and I see a park bench. By being restricted to just one length I'm forced to think of how best to compose a shot of the bench using a 24mm.
Then on a different day I would carry a 105mm macro. Shooting the same bench would involve an entirely different approach.
By doing this I learn the properties of various focal lengths, and develop my own style and technique of using various focal lengths.