I've tried exercising many times, I always give up half-way. I remember reading obesity is pretty much endemic in people (and even if they do lose weight, they most probably than not regain it soon enough), so I have no hopes on that from either.
Then, give up and go back home :)
Listen to music, podcast, to your own mind, whatever.
Don't set a rigid schedule, like, I am going to do this every single day for the next year. Just do it today, no expectations. If nothing works you might as well do it, there is nothing you can loose.
Some days you will go and others you will not.