I wholeheartedly agree with the paper towels over shavings for a day or two. Many benefits--you can see the little fuzz butts poo better (if blood, diarrhea, etc.), they don't slide, gets them used to the chick feed easier as they can see it spread on the toweling near the feeder and easy to tell if water spilled near the waterer.
Set up your heat lamp now if you haven't done so. Put a thermometer at chick level in the brooder and check it every half hour or more to set the temperature. If you can't put the thermometer at chick level, put it on the paper towels. It should be stable at 93-96 degrees. I found a 250 watt red lamp needed to be ~ 20 inches above their brooder floor!
Be sure they have an area that they can get away from the heat to cool down if needed--usually where you put the feeder and waterer. It helps to put the lamp directed closer toward one end--about a third of the way from the wall.
If you have electrolytes for the water put them in it and be sure you fill the waterer a couple of hours before you get the chicks so the water is not too cold as they need to drink as soon as you get them home.
Check the chicks a few times a day for pasty butt. Chicks can get poo stuck on their vents and if it blocks their vent they will die from not passing any waste. If they have any--use a cotton ball moistened with warm water and gently clean them. Don't get them too wet as they can chill so dry by blotting their bums and put back in the brooder under the light ASAP.
Spread feed in front of the feeder so they'll find it.
Dip only the front of their beak (not their nostrils) in their water when you first put them in the brooder as they need fluids ASAP.
Sit back and watch the cuties!