I have been doing various jobs besides filmmaking. During my studies I mostly worked as a dishwasher - probably it could be rated among the crappiest jobs in the world if there would be such a rating. The second one was in McDonald's - the burger making department, even more crappier. I was actually surprised why there is human doing this abnormally repetitive work? It could easily be a burger-robot doing this! 
In both cases, I had no choice. I needed these jobs to sustain myself in a foreign country. So I developed a method. As I kind of hated the whole thing, I broke my work down to a few smaller things.

In dishwashing, I began to keep a small journal - the Book Of Wisdom - where I wrote a dishwashing related notes. We exchanged this journal among other students dishwashers who worked different shifts. We never saw each other at work but we had this journal that helped us. The second thing was order. At some days I thought only about the order - order of plates, an order of my dishwashing station. I developed a complete efficiency around myself including my moves that became a dance like a choreography around the kitchen. Steadily these few things begun to bring joy and the work became bearable.