Make sure to dont waste time when you actually find something of interest when you are searching the WWW - make sure the information you find can be captured for future use, e.g. Bookmark the page address. Copy and paste relevent paragraphs etc into a wordprocessor. Save the file. Don't waste time searching for information. Look for author or authorisation links.
Data can quickly become outdated.
Then treat the information provided appropriately. Treat temporary pages as if they were personal communications - you may never be able to prove to anyone else that the information provided was reasonable. Look for evidence of peer review, e.g. comments indicating peer review or just simple evidence of good grammer, spelling, etc. Know how to reference or address the information if you intend using it. Your references in a report etc should at least include the full WWW addrsss of the page and the date you last referenced it.