There is no shortage of theories, books and experts on sleep. I'm going to try to go through some of them here, in the hope of posting even a word that might be a kernel of hope to parents of sleepless crying babies everywhere.
As an introduction to the topic I'll share with you (Wynn, my sister and PanchuMom reader Laurel... my audience just keeps getting larger and larger!) how we put Lucas to sleep.
We don't have a set sleeping schedule for him, we only put him to sleep when he's sleepy - he starts complaining and swatting his ear. We take him to our bed and either Wynn or I lie sideways facing him. We put our arms around him until he falls asleep. Sometimes Lucas will struggle a bit and get up. We let him do that a couple of times and lie him down again. If he seems to still have too much energy for sleeping we put him in his crib to bop about until he accepts he's sleepy. Then back to the bed. Usually by this point he'll be asleep before his head hits the bed. We give him a few minutes and then we transfer him to his crib.
So far this has worked. We're lucky that he doesn't wake up when we move him to the crib asleep. This is the "method" that works for us right now. Who knows, in two weeks it might need revising.