I am an editor and proofreader too! 🙂 But I work from home, which in some ways is easier. I like to edit in cafes, but I need silence for proofreading. Look into the headphones that others have recommended above? I also like to set timers when I work, as it helps kick me into action. I do ten-minute blocks, sometimes twenty. I find it helps with a) avoiding procrastination and b) maintaining concentration. I know I only have to do a short burst, and I keep a log of how many pages I get through in each block so that I can track my momentum.
Hope you figure something out!