Use strong, active verbs that add punch to your headlines. Avoid the passive voice. Have a subject and a verb, even if it is understood. Don't split parts of the verb and proper nouns between lines. Avoid splitting adjectives and nouns, and prepositions and their objects.
People read the lines of a headline as complete thoughts.
Don't make readers work to find the meaning of your headline. Don't repeat words. The real estate is too valuable. Don't use articles unless their elimination causes confusion. They waste space.