Today's advice from Stephen King again. (Hey, the guy does know a little about writing).
Description is what makes the reader a sensory participant in the story.
Good description is a learned skill, one of the prime reasons why you cannot succeed unless you read a lot and write a lot.
It's not just a question of how-to, you see; it's also a question of how much to.
Reading will help you answer how much, and only reams of writing will help you with the how.
You can learn only by doing.
begins with visualization of what it is you want the reader to
experience. It ends with your translating what you see in your mind into
words on the page.