At my last corporate job, we had someone who kept up with multiple sources of industry news and shared it with everyone in business management and marketing. You won't have that luxury in a job search, but it is good to keep current in your field. For you, these free, email-based news services will help you keep up without going crazy with trade journals.
Huge variety of daily news summaries for industries and functional roles.
Regular news briefings for segments within telecom, life sciences, enterprise IT, healthcare and finance
Daily newsletters about startups and investment activity. Leads on companies and people.