How long will you have the chicks after you hatch them (is it a short term project, or do you plan on keeping them?)?
After day 18 of incubation, increase the humidity to 65-70% and don't open the incubator unless absolutely necessary (or, later, to quickly remove a chick). After a chick hatches, wait until it is almost completely dry and fluffy before moving it to a prepared brooder. If you remove chicks too soon, they may chill easily and the constant opening of the incubator lowers the humidity, making it harder for the other chicks to hatch. I usually take hatched chicks out of the incubator in batches--some may be a little drier than others, but they should all be pretty dry.
Most of the chicks should hatch around day 21 of incubation. However, don't get rid of any hatched eggs until a few days after that, since some develop slower (or faster) than others.
The brooder you use may be a cardboard box, plastic tub, or any other secure enclosure with sides and the ability to heat it. Put some safe bedding, usually wood shavings, on the floor of your brooder. Use a heat lamp or other heat source to heat part/all of the brooder to around 95 degrees Fahrenheit at chick-level. Place at least one chick feeder and waterer in the brooder, too.
If you're hatching bantams, quail, or other smaller birds, you should put some gravel in the waterer to help prevent drowning. Large fowl chicks tend to do okay without gravel in the waterer, but if you want to put gravel in, there is nothing wrong with that. It often helps to get some chick vitamins/electrolytes and mix them into the water, as well. The extra nutrients will help the chicks get off to a great start. Don't forget to dip each chick's beak into the water when placing them in the brooder, too--that will help them find and remember where the water is.
As for food, purchase some quality chick starter feed, usually with 20-22% protein. Offer the feed at all times. It may take the chicks a little while to figure out how to eat, but that is fine. Before a chick hatches, it absorbs what remains of its egg yolk. The nutrients in the yolk can sustain a newly hatched chick for as long as 2-3 days, though most begin eating sooner.
Good luck with your project! If you have any more questions, just ask.