Brand new person asking for “obscure” gear recs

So I’m getting ready to buy my own sup (after constantly using my friends sup.) and I’ve gotten some more “basic” gear saved to get (eg, cooler, phone waterproof pouch, dry bag, board & paddle leash, life jackets, speaker, and sun protection I’ve even got a waterproof speaker.) and wanna know what other less “basic” things people keep on their sups on a semi regular basis. I’d mostly be on a lake and occasionally with my dog. And am just looking for some ideas!! UPDATE!!! I’ve found a pair of headphones due to popular suggestions. And I had a life jacket already because I’m not a strong swimmer.