I do feel bored and lazy sometimes, but I think it's because my daily routine is quite similar and I've never spent time on holiday for years now. I feel like I get burned out now and then, which is why whenever I feel lazy I take a break and read novels. Usually after one or two days, that feeling disappears and I can work as usual. I'm not sure if it will work for you, especially when I don't know whether our daily routine is similar or not. I do think that a break i quite important so that we don't feel burdened when our daily life is monotonous.
True, everyone is not the same, as they also experience different situations either when they are lazy or stressed out.
But it’s very important and healthy for one to always do what they have pleasure in or what they love doing each time they feel lazy, not focusing, stressed or feeling unusual, that might help them to relieve themselves from it, also it helps when one do some exercise, for it really helps boost their mood both mentally and physically.