Many journal publishers offer email alerting services that can help you keep current with the published literature. You can register for for an alerting service by visiting a publisher's webpage and completing an online form.
Registration is free.
Typically, once you have registered you will receive periodic email messages containing the tables of contents for just-published issues of journals in which you have indicated an interest. Some publishers give you the option of submitting subject keywords. The publisher will perodically search your keywords and send you email notices about articles containing your keywords. Some journals covered by email alerting are available in full-text electronic format. Visit the HAM-TMC Library's Electronic Journals Remote Access to see what journals are available in this way.