You can access the PubMed user Guide from the new PubMed website, or watch a video produced by your friendly DMU librarians to help you get started in the new interface.
The most comprehensive set of tutorials for PubMed are straight from the source - The National Library of Medicine. NLM has created both print documentation as well as brief online tutorials. What to search like a pro? Study these tutorials to enhance your skills.
Not sure if you are correctly typing out an abbreviated journal in PubMed? Hover your mouse over the name of the journal to view a the full title.