Don't know how the OP is acquiring the chicks, but if getting the chicks via mail-order, the most important thing you can have ready for them, IMHO, is Gro-gel or a vitamin/electrolyte powder to mix into the water.
Shipping is stressful to chicks and I'm continually amazed by the number of posts complaining about listless, failing chicks from people who don't think to have this stuff on hand when their chicks arrive.
I believe that the vitamin & electrolyte additive I put into the chick waterer saved one of my chick's life.
It certainly isn't always necessary, but why not be prepared?
 
For the first week, instead of providing chick grit, I put a pan (cake pan or pie plate) full of playground sand in the brooder.  Not only will you be amazed by how much of it they seem to eat, you will find that it provides both the chicks and their humans hours of entertainment as the chicks take dust baths in it!
They LOVE it! And it's so adorable to watch them pile in and flutter around!
(they'll also poop in it, but it's easily cleaned if you sift the droppings out from time to time.  I also completely changed out the sand every few days.)
 
Best of Luck!