I'm probably going to get downvoted for saying this, but putting "vote however you like" or "I expect downvotes for this" or "I know this isn't going to get upvotes" in a comment almost guarantees your comment lots of upvotes. It's almost as if when you say you expect people to downvote you their instinctive reaction is "Don't tell me what to think!" and they do the opposite.

EDIT: Apparently implying a parent comment is pandering for karma is an equally rapid way to get it downvoted. Please don't downvote the parent comment because of this one- I actually found it quite witty.