Your role is to be mom's support system as she goes through delivery and birth. I know you're probably nervous and excited, even if you've done this before. Here are a few items that may help you do your job better when the time comes:
Gloves
Have plenty of disposable latex gloves available for handling slippery puppies.
Washcloths
You'll find washcloths or cloth squares convenient for holding those pups.
Quick Tip
Keep the washcloth away from their mouth and nose to prevent suffocation.
Flashlight
Keep a flashlight handy in case mom's bathroom break happens in the middle of the night.
A Notepad
You will want to keep a whelping record to record the births. Grab a notebook and write down the time and date as each puppy is born.
Need to Know
Your vet may ask you for this later on if there are any complications.
Coffee
Coffee! I know it's silly, but seriously, you'll probably need it throughout the process. I know I definitely would!