In "The Jewel Hinged Jaw" Samuel R. Delany points out that the essence of being a visual artist is not in drawing or painting, but in seeing. If you can't see really see, he says, it doesn't matter how skilled you are with the brush or pen.
Delany makes the point because the same thing is true of writers. In order to write successfully you have to observe. You must look at what's around you and really, truly, see it.
Most of us, like Dr. Watson in Sherlock Holmes' famous phrase, see but we do not observe. If you want to be a successful writer you have to train yourself to go beyond seeing and into observing.
It's not easy, but it can be kind of fun.