Hijack a book club.
Or at least find someone who will read your chapters out loud to you.
I find this to be an indispensable tool as I get further and further along in my book. There are a lot of characters and plot threads to keep track of in writing a novel, and hearing my work read out loud helps me catch any inconsistencies in voicing, style, and continuity. It also helps me catch those typos that my eyes can no longer see on the page.
The best part, though? Listening to someone else read my book allows me to see the story afresh through that person’s eyes. I can immediately tell by the reader’s reaction whether or not a joke is working or whether or not I’m hitting the right notes in my story.
Just make sure your reader is trustworthy, or you might see your favorite plot twists being discussed on Facebook.