Pay attention to the type of website you are looking at. Websites that are .edu, .gov, or .org are usually more trustworthy. However, you may want to investigate websites that are blogs, discussion posts, etc. if you are seeking out primary source type information.
Also, make sure that any information you use has an author connected to it. Information found on websites with no authors listed can be problematic, because you don't know who is giving you the information and whether or not they are qualified to be writing on your research topics.
The web has a ton of information contained in it, but not all information is created equally. When using sites like Google to find resources, remember to focus on the types of websites you are finding, authors, and credentials to ensure that the information you are finding is reliable and correct.