Still not sleeping...

Okay that's not all true. Iain does sleep through the night once in a blue moon. But most of the time he screams at us till someone comes and gets him. Still there are days that he will just stare at the ceiling for hours and than stare out the window till he gets bored (no screaming when he does this). But it's not every time. Brian and I are not getting the sleep we need because of this (one of many reasons). We have read Healthy Sleep Habits Happy Child ( I've read so many books on this subject I think I could scream); we have decided that we are going to do the cry it out method. What did you guys do?