Baby Prepping

What are everyone's opinions about buying and getting baby stuff before being pregnant? 
My husband is borderline with it. 
I feel like not only is it good so you'll have everything by the time it happens... but my mother in law is super in law of attraction... I am a little and I read a lot you have to open up to what you want... if you want something, you have to make it, attract it, want it... if you want a baby, make room for it, prepare for it.... and I agree. But then I have heard it's bad luck. 
Just want to hear some other opinions, thanks.