Use adverbs sparingly. Adverbs tend to be telling and are a sign of weak or amateurish writing. Verbs are much stronger. For example, compare:
The boy walked slowly down the road.
The boy trudged down the road.
Not only does the second example, which exchanges the adverb for verb, offer a more powerful visual to the reader, but it also injects more tone and emotion into the scene. Much stronger. Adverbs have their place, but do watch for -ly words in your writing and at least consider whether there is a stronger, more vivid way to write the sentence.