HOW MUCH?

I am going over some works that need some editing. The thought came to me 'how much is too much?' Overdoing editing can ruin a good story.

I have two stories and a poem that need work. One story needs a few more sentences. The other needs more. The poem, however, needs another line and maybe different words. I have written stories which needed to be shorter. Had too much jabbering. 

Leaving a good story alone is something I have learned over the years. When I feel satisfied with the piece, there's no more to be done. Editing is challenging but, then again, I like to be challenged.