calibrating screens

I'll start off with the calibration of my screens as I use several ones, using spyder 3 I first calibrated my laptop screen and I do see that calibrated colours and brightness are darker compared to uncalibrated. With 3 mores screen to calibrate I should be ready to use any and get the same colors on each. I realise it is important as I've seen a dramatic difference between my laptop and standalone monitors colours and contrast, this gives a different perception in how the colours appear saturated..