Articles chop up your topic into little, narrow questions. If you find 5 articles, each presenting a narrow study, it's often hard to see how they fit together and what question they are all trying to answer. But encyclopedias and handbooks
Blogs give you ideas about talked-about issues.
Generally are openly biased (the author has a point to make and may have little research to back him or her up.)
Keep you up-to-date on what's going on around you.