When you are searching for something keep your search simple. Pick out a few key terms and go from there. Less is more in this case. Often i will use only one or two words to find the information that I need. If I get overwhelmed with irrelevant results I will slowly become more and more specific. Example: is normal birth kids are less smarter than cesarean birth kids? This is far too wordy, not to mention that it is grammatically incorrect. Pick out a few words such as "intelligence cesarean" and you will come up with websites like this which has a research study on this very subject.
Next you will want to evaluate the website that you get your information from. Is this website an official website. The article I linked to is in a database of peer reviewed medical studies. It should hold a lot more weight than a personal website like a blog where there is no need for the writer to actually be correct. I can write that the moon is made of cheese but that does not mean anything. I would believe a person that has been to the moon and says that it is made of rock over me who has never even been to the moon.
Scan the blurb where it shows your search terms coming up. If you can't tell if the website has anything to do with what you are searching for then the information is unlikely to be there. Also watch out for sponsored results. The can often have nothing if anything to do with what you are actually looking for.
You also need to see how old the information is. If the article is from 1906 rather than 2006 then you know that things will be out of date. Things change and sometimes even change back so you need to be careful about what you are reading and take it into consideration.
Finally my biggest tip is this: do not go beyond the first two pages of search results. You are wasting your time. The further you go the less relevant the page is to your search. That means quit clicking on my web page hoping to see a picture of Brittany Spear's hooha because it ain't here! I just wrote about a silly dream I had about her.