Favorite stuff to bring on race day?

What do y'all like to bring in your bag on race day? For reference the only things I have on me are shorts and shoes. Here's my list for the bag:

• phone and wallet
• sunscreen
• towel
• flip-flops (plan to toss shoes)
• water and snack (mostly for after)
• change of shorts

What else do y'all think is important to bring?