When job hunting, a strong resume isn’t enough. You need a winning cover letter. The ideal length is one page. Reason? Most cover letters are read in less than a minute, according to the Society for Human Resource Management. Your endgame: Go for impact and stay on point. Lay it out. Start with a one-paragraph introduction. State your key value proposition and the job you’re applying for. If you can combine both in a snappy opener, so much the better, says Burton Nadler, author of “The Everything Cover Letter Book.” Include a teaser spotlighting current and past wins.