No one else will make sure you find credible/reliable information online except you, so be picky about it!
At the bare minimum, make sure you can identify the following things on a web site:
- the date it was posted/updated
- who wrote it (bonus points if you can Google that person/organization to see if they're a credible source of info)
- why the info on the site was written (is it opinion, persuasion, or just informative? Check he site's "about us" section)
Here are some more in-depth questions you can ask yourself to figure out whether you're looking at a high-quality web site: