KEEP TRACK OF YOUR RESOURCES!
When accumulating the resources you will use for your paper, keep track of the information you will need to cite that resource if in fact you use it in your paper. That means, write down the information typically used in a citation (see left sidebar), for example, the author(s)' name(s), complete title of the resource, publisher, date, etc. Perhaps you can make and keep copies of the first pages of the resource, whether print or electronic, for easy citation later.
The reason for this tip is that if you don't keep good records, you may end up trying to re-locate that resource. This can be a time consuming, frustrating, and ultimately unsuccessul endeavor!
TIP: Start early! Don't be afraid to ask for help!!
Style Manuals:
MLA Handbook
Publication Manual of the American Psychological Association
AMA Manual of Style