eResources for Emergency Medicine
http://lifeinthefastlane.com/ The home of FOAM (Free Open Access Medical Education (#FOAMed on Twitter)). Lots of good blog posts and a great place to go to find links to everything emergency medicine.
http://emcrit.org/ The cutting edge of ED critical care.
http://www.emrap.org/ An excellent podcast on all things emergency medicine. Listen to this every month and you will know you are up to date. Expensive. Hopefully your department has a subscription they can share with you.
MD on Call. A great phone app for your first few months on the job.
Palm EM: App for your phone, iPad or tablet. A great app with lots of excellent calculators for drug doses, tube sizes and an approach to many diseases. Not so good for undifferentiated case.
Pedistat: Great paediatric resource. Get it! US$ 3.
UpToDate is great if you have access to it through your institution.
eMedicine is pretty good. Sometimes it is a bit clunky as they try to fit everything into the same format.
And, of course, Dr Google knows everything