Wordiness...

I'm going back over a story that's been on the shelf for a while and I'm trying to cut the useless words. Not an easy thing in fiction because we need to describe things. Hoping that when someone reads our stuff they can visualize the scenes. We need to put pictures into their heads, but how much is too much?
If I see too much description in a book I start skimming. Too little and I find myself going back to see if I missed something.
When writing sometimes I take things out only to put them back on the next rewrite. Sometimes I waffle back and forth---should I or shouldn't I?
I wish there was a black and white rule. Then I would know for sure.
Do you think Harlen Coben worries about these things?
This is my new foster dog. Her name is Riley and she's 3 months old.