Before you begin your research, consider your key words. For instance: school lunches obesity will retrieve more targeted results than school lunches or are school lunches healthy?
Try adding "loaded" terms that you know will retrieve opinionated results. For instance: antiobiotics animal feed unsafe; organic foods pricey. (This technique works especially well in Google searches.)
Remember to try related terms: sometimes the first term you try may not be your best. For example instead of "green fuels," try: biodiesel, ethanol, bioethanol, etc.
Refer to Finding Articles for tips on how to search a periodical database using keywords and Topics (ProQuest) or Subjects (Academic Search Premier). Databases require you to use Boolean logic when you search them. Several symbols may be useful too:
and – for combining concepts/keywords, will narrow the search: organicand regulation
or – when you are using related terms, will broaden the search regulationor certification
“ ” – when you are using a phrase: “asian diet” in a single search box
* – when the terms have a related stem: omniv* for omnivore, omniverous, etc.
Refer to Searching the Internet for tips on searching the Internet effectively using Google.
Limiting your search by domain (site:edu or site:gov) is often a good way to start.
Look up the topic on Wikipedia to find additional keywords, links, references. But do not use Wikipedia as your source: it is not reputable. (Who is the author? Can you identify the author as an expert?)
You can tell whether or not your website is authoritative by applying the same rules you'd apply to any source: Is the author an expert on the subject? Is the sponsoring organization reputable? (Check Contact, About Us, Mission, etc.)
When you look over your results, check both location and call number. Request the book if you want it; browse the call number area for related material here.
Look at the Subject(s) for more books on your topic. In some cases you may find several headings that are relevant.
Noodlebib is an online tool that allows you to format and save your citations. Many students find that the upfront effort of getting started on Noodlebib is worth their work in the end. Another resource: MLA Style Guide (PDF).