Hi, K.! I am a childbirth educator and mother of three. I think the question isn't how you get your baby to sleep in the crib, but instead, should you try?
If you look at our ancestry, we are a hunter-gatherer society. All of our very basic drives come from this past, and any aspect of our lives that we look at, from our societal love of sports to our relationships with our spouses are driven at a deep level by our biology.
Looking at this model, of course our babies want to be in our beds! Their very survival, in their primitive minds, depends on close and constant contact with their caregivers. Leaving a baby alone in a hunter-gatherer society would expose her or him to the elements or predators.
Many experts have touted the message that we need to teach our babies to sleep, as if we're going to realize on their tenth birthday that, uh-oh, we forgot to teach little Bobby how to go to sleep! It's a natural ability we all possess, and the best possible way to ensure a deep and restful sleep is to have the baby right beside you.
Also important to look at: what message are we sending when we let them cry it out? At this age, a baby's wants and needs are the same. They aren't manipulative. One of their needs is comfort, and why on earth would we withhold comfort, anyway? Teaching them to self-soothe? Through crying they are expressing a need, letting us know they are having trouble finding the comfort they have a need for. They will learn true confidence in the world only through our attention to their needs. There is a multi-billion dollar industry in pacifiers, soft blankies, teddy bears with heart beat sounds, crib toys, and monitors. Aren't we just trying to convince our babies to attach to objects instead of people? What if we just took the easy road and had them fully attached to us?
The reason it's hard to let the baby cry it out is that you're responding to your basic biology. Many experts tell us to ignore this, and in doing so, to ignore our very basic biological need to make sure our baby is comforted and happy. Did you know a baby's cry is the absolute perfect pitch for our ears to hear? There isn't a sound in the world that we hear better than a baby crying. Why would that be?
I know I felt like such a lazy mom with my first son, giving in to him and bringing him into my bed. It's where he so desperately wanted to be, and we loved having him there. We thought we were being bad parents by giving in. When I started looking around, like you are, I was shocked to realize that all I had been doing was listening to my heart. Letting the baby be in the bed isn't bad for him. He wants it, you want it, and it's really good for his confidence in the world, your relationship, and his sleep habits. Naptime will be easier if sleep isn't a battle. Getting him out of your bed when he's older will be much easier, too, as he is able to better understand reasoning and learns to self-soothe naturally, without it being forced on him before he's ready.
Our first son (who slept with us until he was 4)has put himself to bed since he was a toddler, never complained about naps, and relates bedtime to comfort instead of conflict. Our second son is also an amazing sleeper (he slept with us until he was 2 1/2) and rarely complains about bedtime. We have a 5-month old daughter who sleeps peacefully by my side every night. I have been getting lots of sleep since she was born, thanks to just being able to nurse her and go back to sleep myself.
We have to be more creative with sex, but that isn't necessarily a bad thing...
I would never have my children in bed with me if I drank excessively or used any type of drug or sleep aid. People worry about rolling over on the baby, but you've probably found that you're aware of the baby all night on some level. There are lots of products available for sleeping with your baby, too, that prevent sound sleepers from rolling over onto the baby. We've never had a problem with this--it's a very natural thing to do, when it comes right down to it.
Do some research, and especially look at www.mothering.com where you'll find lots of well-researched articles and support for sleeping with your baby. In parenting, the more natural the better! Why fight it? You and your baby are the real experts.