Consider the source--Use recognized authorities. Know who is responsible for the content.
Focus on quality--All Web sites are not created equal. Does the site have an editorial board? Is the information reviewed before it is posted?
Be a cyberskeptic--Does the site make claims that seem too good to be true?
Look for the evidence--Rely on research, not opinion.
Check for currency--Look for a date. Is the information current?
Beware of bias--What is the purpose? Who is providing the funding? Who pays for the site?
Source: MedlinePlus Guide to Healthy Web Surfing 2014
Advanced Google Search - to focus your search
Google Scholar - to search scholarly books & articles
Google News- to search online news sources