Asyndeton vs Polysyndeton

Use asyndeton:
Smart. Terse. Effective.

Use polysyndeton: To add description, to bring clarity, to create drama, to inspire poetry, to artfully elevate one's writing.
And Use polysyndeton: For the structure, for the thoroughness, for the liveliness, for the children, for all that is good and holy.
And Use polysyndeton: When nothing else will do, when the mood strikes, when bad turns to worse, when making a long speech, when you get paid by the word, when you never get tired of your own writing.