Information overload!!

There is so Sooo so much info out there on newborns how does one decide what to go with and what to go against? I've just been trying to go with the most reputable sources and first and foremost my doctors! 
For example:
Co- sleeping (same bed): some argue it causes sids some argue it reduces risk of sids
Co-sleeping (bassinet): some argue it reduces risk of sids 1st 3 months, I've yet to find a doctor that will agree with that! 
Rock and play or any non-flat surface sleeping place: too many conflicting arguments to list!