Certifications for new grads going into the ICU?

I am about to graduate from nursing school within a couple of months an will soon be applying to new graduate residency programs. I am very passionate about working in the ICU. Does anyone have any recommendations for certifications I should get before I start applying to ICU positions? I already have my BLS, ACLS, NIH stroke scale and ECG interpretation certifications. Any input would be very helpful!