Well, a big part of DJing is stage presence and interacting with the crowd, If you have energy and look like your enjoying yourself, and the music the crowd will enjoy themselves more as well and see you as a more exciting DJ, So basically I’m trying to say, enjoy yourself! Dance a round a little bit, look at the crowd and study how the music you are playing is going down with them and decide what should come next in your set and then start mixing in the next track, while bobbing to the beat and dancing at the same time.
Other things you can do: Have a drink, check your phone, do a little bit of live remixing on the current track with FX.
I hope these suggestions helped!