I am sure everyone can empathize with you about feeling lazy or unproductive. I think forcing yourself to get sixty minutes done is the best trick I know.
When I need to get some uninterrupted writing time, I rent space. I go to a local coffee shop, buy an Americano and consider that I am renting a spot to write for at least sixty minutes.
I find that by getting out of my comfort zone, I can make myself get down to business. I know that it is much easier said than done, but I know that this technique, so far, has worked for me every time.