Re: spit up
Spit up is caused by the LES valve between the stomach and esophagus failing to constrict adequately, thus allowing stomach contents back up into the esophagus. MOST babies have an immature LES valve, which is why most babies spit up. If the spit up does not cause pain, significant discomfort, failure to thrive, weight loss, dehydration or significant sleep disruptions, then it is typically considered perfectly normal, and will usually be outgrown in a few months.
Here's another link that might interest you:
Mama to Lorenzo, born 4/25/2007. NICU graduate, Gastro-Esohapgeal Reflux, Obstructive Sleep Apnea, Sensory Processing Disorder...alive and thriving thanks to breastfeeding and co-sleeping.
Those who say it can't be done should not interrupt the person doing it.