Effective Ways to Improve Vocabulary: Tip #4.
Don't (exclusively) read fluff. It's okay to indulge in less intellectual reading and writing. We all do it, and it can be fun. But don't read fluff so steadfastly that you ignore heavier stuff. USA Today is an example of a fluff newspaper notorious for watering down concepts and avoiding sophisticated language in order to appeal to the masses. Although it's arguable that they're doing some good by making news more accessible to a wider group of readers, they're also guilty of neglecting critical shades of grey when it comes to politics, economics, sociology, and the other disciplines they typically cover. Unless your vocabulary is indubitably weak, you're not going to improve it by reading something like USA Today.