know your artists and what they add to a picture {for example Leonid Afremov adds color and abstraction, if I want soft yet defined wild flowers, Monet is a good choice, etc.
do not just use the descriptors listed {you can use countless others like Birdseye view, or sparse, its nice to have a thesaurus handy}
learn to create your own prompt sets, and don't be afraid to put many prompt lines in. {as an example to soften clouds in a pic, I might add a line which says "soft, ethereal clouds". If I want sharper grass, I might add a line which says "hyperdetailed green grass" etc. You add as many lines as you need to define what you want. Though it won't always work, you will get better and better at recognizing what works!
Do not always use the final image, sometimes a 70 or 80 percent {and even occasionally a 40%} might be better.