How to write badly

Please stop abusing adverbs.

Adverbs modify adjectives or verbs. Once you learn what they are, I think your writing becomes worse because they're an easy shortcut to telling somebody something. Your villain needs to be cruel? Just say "he smiled cruelly" or some garbage like that. Why bother having your villain do things that only the truly heartless would do, when you can just tell the reader that this guy's seriously not a nice person?

Try this: every time you want to use an adverb, put the one that means the opposite in its place. Read the passage. If the opposite meaning is also coherent, you need to do a rewrite because there's not enough character there. You're making that poor adverb do all the work for you.