How to start your novel: Non-linearity
Screw continuity and linearity
Just because your are writing a particular plot line or a character’s perspective doesn’t mean you need to continue writing the same. If you have hit a mental block on this plot line, just start writing another thread which interests you.
This is the only way you can keep writing without burning yourself out. Keep jumping from one thread to another unless you are in a groove and churning out pages after pages in this particular thread.