Hospital bag-Do's and Dont's

Ms
So being a FTM I have never done this before and I'm not really sure what to pack...or even how soon to pack it.
I'm 29 weeks today. And the only thing I know I need to bring is the disposable cooler bag I purchased--I'm having my placenta encapsulated.
Aside from that what are the essentials I will need to bring? What are some things that are nice to have burnt would be able to live without? And lastly what are things that you have packed before that you realized you absolutely do not need?