What counts: newspaper articles, magazines, museum websites... credible sources but not scholarly. Random blogs do not count! Really take a look at who is producing the information and whether or not they've given you any reason to trust them.
Especially verboten:
Access online library materials through the library databases!
To access the databases from off-campus, you will be prompted to enter your LSC email/password or your 14-digit library barcode.
JSTOR and Project MUSE are exclusively scholarly -- but make sure you're not using anything labeled a "review' (i.e. a book review, which is a tertiary source and not what you're looking for). Back Matter and Front Matter can also be safely ignored.
Depending on what info you're trying to tackle, different subject-area databases may be helpful -- e.g. Van Gogh's well-known struggles with mental illness could warrant a trip into Psych & Behavioral Sciences Collection.
I've given a few starting points, but you may also want to explore the larger lists of databases for more options.
Be sure to look for the checkboxes for "full text" and "scholarly (peer-reviewed)" in these!