PubMed – Recent Enhancements

My NCBI Collections: Save PubMed Search Results
http://www.nlm.nih.gov/pubs/techbull/jf06/jf06_collections.html
Save search results indefinitely within PubMed using the new NCBI feature Collections.

PubMed Limits Page Enhanced
http://www.nlm.nih.gov/pubs/techbull/ma06/ma06_limits.html
These enhancements include the ability to:

Limit your results by author or journal
Limit your results to full text, free full text, and abstracts
Choose one or more selections under categories (for example, Languages)
and much more…