When my writing is at its sloppiest, the funny thing is that my sentences get longer and longer. It's a bad habit of mine; it actually takes less thought and effort to write a wordy, clunky, and ultimately dull sentence than it takes to write a short, punchy one. Have you seen your sentences start to creep across the page as you get more tired or if you're out of practice? We have the urge to be loquacious, and it does our work absolutely no good.
There is a solution, though; we just have to rein it in and chop it up. Today, go through the last long, wordy, abstract paragraph you wrote and cut it in half. Cut out the adverbs. Cut out the nested clauses. Give the reader more powerful verbs. Avoid the verb "to be." Avoid little words like "of", "the", or "into." Re-phrase the sentence so that fewer small filler words have to be used.
There's always a way to shorten a sentence. Once you have, you'll notice that your sentences will pack more of a punch. They will feel more directly connected to the emotion you're trying to access. They will deliver your reader right into the arms of your story.