I'm sorry I did not explain further earlier.
In my father's view it says first that everything we do, as you note, should be as an act of worship towards the Lord. A corollary is that it covers how we do things, we are not to worship in a half-hearted manner, but rather attempt to do everything as well as we can.
It governs both the intention, towards God, and the quality of our actions. If we are building a bridge, we make the best bridge we can, if we are mopping the floor, we mop the floor well, if we are cooking, we make the best food we can... writing, eating, it does not matter what the action is.