As a writing exercise, I often try to describe random objects or scenes that I see in my daily life. I don’t type them out–just in my mind. But I try to come up with the words to put exactly what I’m looking at right then into someone else’s head. How do I get across that particular color or shape, the specific way the light reflects there, or the exact way that smell made me feel?
Think of it like a daily work-out for your descriptive powers.