Are you using too many adjectives and adverbs? This is kind of from the previous post. If you rely upon an overused adjective or adverb to do the description work and don't use a strong verb, you don't paint a picture of your writing in the reader's mind. Adverbs like "suddenly","somply","painfully" etc are overused. That's not to say you can't use them; do use them but don't rely upon them for too much description.