PubMed has two ways to receive notices about new publications of interest: RSS feed or an email from a saved search in My NCBI.
RSS Feeds for Microsoft Outlook
Web of Science (Includes Biological Abstracts, Science Citation Index, Conference Proceedings Citation, and more)
JournalTOCs (Table of Contents) Service
JournalTOCs (http://www.journaltocs.ac.uk) is a free service that makes it easy to find, display and store Tables of Contents from scholarly journals in all disciplines from over a thousand publishers. You can also import them into your Google Feed Reader or Microsoft Outlook RSS Feed Reader (instructions below).
First, find the journal(s) you want to subscribe to and click on the title.
Then decide if you want to view the TOCs on the JournalTOCs website or through a Feed Reader.
Pick a Feed Reader...
Or create an account and see your journals and saved searches on the JournalTOCs website. Set up an email notification to tell you of new TOCs on the website.