Hi, I am a new graduate in a busy regional trauma ICU. I started in March with past experience as a medic but no patient care since the summer previous. It was hard for me as well to get "back" into patient care, and the first two months were tough. The other night I had my first "I really like this job" night, yippee!
People from allnurses recommended http://www.icufaqs.org
which was a good interesting read although sometimes specific to the authors' hospital. I own Paul Marino's "The ICU Book" which is fabulous, and I splurged on AACN's "Core Curriculum" and "Procedural Manual" because I am a nerd.
My facility focused my three month orientation at on-the-job training only, but I hear that AACN's computer program "ECCO" is great if your unit owns the license. I also try to stay up on the journals. There are hopefully some classes in your area that you can take as well.
Hope your experience is a great one!