My comments on this list:
#2 - Not needed
#3 - Same as above
#4 - Not needed
#7 - Definitely not needed (for newbies only)
#8 - For what... sandwiches?
#12 - Not needed
#14 - Definitely not needed
#15 - Not needed, provided in cabin
#16 - Same as above
#18 - Not needed, tips are included in the charge
#20 - Please don't do this!!