hi spidyqueen,
for nb, it is good to start train them sleep in their own cot especially at nite. NB cannot differentiate daytime and nitetime. So by putting them in their cot at nite, off the light(on aircon if required) can help to train them to adjust to timing and they sleep longer through the nite and to be independent to sleep alone. During the day, they can sleep nap in the living room, or rocker/ on your bed. By letting the baby sleep w the adults over time, he will need to sleep with someone beside all the times. The same goes for bringing the Baby out -- if u start with Sling, the baby will be used to being carried around to sleep. If u start with Stroller, the baby will be used to sleep in stroller, and cannot sleep by just carrying him.