Online
An article your Great-Great Aunt Ruth shared on Facebook
Maybe! You'd have to check the URL and double check it is not a propaganda site, satiric, or a hoax site.
A memoir
Maybe! If you're looking to incorporate personal anecdotes to support your paper (this kind of evidence will usually rely on the "ethos" rhetorical strategy) this source may be useful to you. However, please note this type of source may be more easily dismissed.
A blog post
Maybe! As a guide, a blogpost is never the best possible source to use in a research project. However, if you really like the post, be sure to pay attention to other factors such as:
If the post cites any sources outside of itself, and the credibility of these sites
Who is writing the blog, and any motivations they may have had for writing such an article
A textbook
Yes! Be sure to make sure it is the most up-to-date edition, though.
An article I found using JSTOR or any other peer-reviewed article database through the OSU library website
Yes!
A self-help book written by a licensed counselor or psychologist
Maybe! If you're looking to incorporate personal anecdotes to support your paper (this kind of evidence will usually rely on the "ethos" rhetorical strategy) this source may be useful to you. However, please note this type of source may be more easily dismissed.
A website ending in .edu or .gov., such as the cdc.gov (Centers for Disease Control)
Yes! Be aware though that these institution-run websites can also host blog posts, and the information found may or may not contain the names of their authors.
Yes! Interviews can be a great source to use if you want to collect your information in a more hands-on, personable way. Just be sure the person you are talking to is credible themselves (they might have a college degree on the subject you are asking about, or have completed certified trainings on the topic, etc.)
An article from the Onion or Reductress
No! As funny as this satire website may be, the information found in an article such as this should not be taken as fact.
An interview you heard on the radio
Maybe! Be sure you check the potential biases of the new source that broadcasted the interview, as well as any participants of the interview