I’d warmup a little bit. As others have said, there is likely to be attacks early and you’ll want to be ready to hang on through those surges. Not much. Get the blood flowing to the legs and break a little sweat then stop.
I’d carry a saddle bag with tools and flat repair. Yeah, race is over, but I wouldn’t want to have to rely on a chase car to pick me up and get me back to the line. Kind of a personal preference if you want the bag or use jersey pockets. I want my pockets empty for nutrition and an extra bottle for long rides and races, personally.