Myself and counterpart were not used to getting up at 5:00 am, we weren't used to having to produce material everyday and so many other little things that I will not bore you with them here. After 8 weeks we feel like we're cruising. Everything is getting easier and we're still having a blast doing it.
You really only know what you know. My point is that play music you know about, stuff you enjoy and talk about things that matter to you. If you do this you will come off as more sincere and your listeners will respect you for it.
My new motto "Know what you know"