DC question

For those who have been to the March before, is there any things I should bring like for sure I may have not thought of???? I have that I am going to pack
Tennis shoes incase it rains and I cant wear my comfy warm suede boots;-(
Magazines
Sketch Pad and pencils
Makeup
Toiletries(toothbrush etc)
Contact case and glasses
Extra socks
a book
my Bible so I can read my one chapter a day even when I am gone


Anything else????

XOXO