Definitely want to calibrate your screen. The process is really tough, and I failed. Thankfully there are a couple threads here with people posting their profiles. Search for 'calibrate' and you should find a few. One of them warmed up the colours for me, and I love it.
The issue I had with calibration is that it takes a few hours for you to sort of adapt. And I was never that patient. For example, now that I've been using this warmed up profile for so long, the default looks very very blue. Except, I know it isn't, as I was actually quite happy with the default for the first couple weeks. Be patient with it.