What's the best way to break up the monotony? Do something different, duh. Find a new thing and spend some time.
The problem with that advice is that new things can still be boring. I could go and watch a new movie, but still be thoroughly bored. A movie may be new, but most likely, it is using the same characters, same relationships, same fake dangers and insignificant problems blown out of proportion.
Things need to be new and exciting. If you don't care about it, don't waste your time on it. Writers ought to read, but if a book is drivel, then toss it. Sure, there is value in a bad book, but only if you care to learn from it. If you don't care, you won't get anything from it.
When it's time for something new, do something new. Just make it something worth your time.