I do not find it challenging to keep promises because I don't make promises which I don't intend to keep. If I am making a promise, it means I am going to see that through no matter what.
My promises are generally broken as a result of happenstance, or a greater promise made due to change. It is essentially what I imperatively must do at that point in time because things have changed. Otherwise, I don't treat my promises like promises. I treat them oaths. And that what people in the modern world must realise as a part of their humanity.