This is not the full instructions on how to catalog OA items. Listed below are a selection of quick hints to help you remember what to look for in specific situations. For the full instructions and best practices see Metadata Practices (OA)

ALWAYS

How to: MIT AUTHORS

How to: MIT AFFILIATIONS

How to: PUBLICATION DATE

How to: SUBMITTED DATE

How to:  SPONSORS

How to: Copyright Statements

How to: LNCS (and other Springer Series)

LNCS are conference proceedings that are published as books in the LNCS series.
Example: http://dx.doi.org/10.1007/978-3-642-12683-3_8
The ABOUT tab form the DOI page will provide much of the information needed to catalog the item

How to: SPIE

How to: ACM

How to: IEEE

How to: PNAS

How to: APS

How to: ITEMS WITH NO DOIs