Learn as much by writing as by reading.
- Lord Action
Read as much as you write. Any writer who says that they don't read that much is not a true writer.
Read for the study of writing, to see what you can take from other authors' styles and ideas. You need not copy the author's style, but getting impressions of other's work in your writing is a healthy thing.
While writing a novel, read a novel. While writing poetry, read poetry. To be surrounded by the words of the masters in important.