Levy Suspect Returns to D.C.- Good
This headline was found on washingtonpost.com. It's short, includes important search words, and follows the subject-verb guidelines. It's also in active voice and lets readers know the most important part of the story they are about to read.
More being foreclosed into homelessness- Not so good
This headline was found on The Boston Globe Online. The main reason I don't like it is because it's written in passive voice, which in turn makes it longer than it probably needs to be. It also doesn't include good search words. 'Foreclosed' and 'homelessness' are very broad terms and if entered into a search engine would bring up a huge amount of unrelated stories to the area it's supposed to be about. It's also not specific enough to convey the main point of the story.