Knots are the worst. I don't know anyone whose hair doesn't knot in the back once it's past collarbone length. Mine always does and although I'm sometimes lazy and don't do this, braiding it in a loose braid overnight is the way to go. I propose we all make a pact to braid our hair overnight so it doesn't knot and eventually break off at the nape of our necks. If you're a crazy sleeper maybe you should braid it and then wrap it in a silk scarf too. You'll look so cute!
It can also help to put a little oil on your hair before braiding so it's extra soft. Right now, I'm obsessing over Nuxe huile prodigieuse. I love that stuff in the summer. You literally need like 3 drops of it for it to work it's magic. Are you going to join the braiding pact so we don't end up with hair like the model in the photo above? Although that entire image is pretty rad isn't it?