I wouldn't use the Ferber method myself "cio" but I've heard good things about this book. You basically put baby down almost asleep after rocking or some other comforting bedtime routine, and baby learns to settle in and fall asleep all the way. This is where we're at. I never put her down wide awake, but she makes herself a bit comfy before falling completely asleep.
You respond immediately every time they cry and keep sleep logs...