Descriptive:
* The flowers were arranged nicely in the vase.
* The music played nicely in the background.
* She sings nicely, even though she's shy.
Adverb of Manner:
* He dressed nicely for the occasion.
* Please handle the fragile vase nicely.
* She spoke nicely to the customer, even though he was rude.
Expressing Approval:
* You did a nicely job on that presentation.
* It's nicely done, I'm impressed!
Informal:
* "Thanks for coming, nicely done," he said.
* "That's nicely put," she replied.
The best way to use "nicely" depends on the specific context and what you want to emphasize.