Yep. Several (many?) years ago I was reading through Finney's Lectures on the Revival of Religion. One of his lectures talked about this very thing. He emphasized that you can do any (ethically permissible) job to the glory of God. You didn't have to be a "super saint;" all you had to do was change the motive. Stop doing it for yourself and start doing it for God.
Too simple, right? But he was correct. It doesn't take more energy to do something for God. It just requires a change of emphasis. And a willingness to die to self. And that is probably the real issue, isn't it?