Fortunately to get over the addiction you don't have to go cold turkey, I'm talking about not staying up late watching Netflix, not making it what you do with the majority of your time.
It's hard, but you'll feel so much better!
Step 1: Set Goals
I put my phone away completely when I get into bed for the night.
Step 2: Find a Substitute
Other substitutes can be knitting, crocheting, anything relaxing you can do in bed. You could meditate and even keep a diary. I sometimes write in a diary because I have a busy mind. If this interests you I've found that on nights I write I remember my dreams.
*don't use your phone or other devices, I wouldn't recommend anything you'd complete start to finish in one night
Step 3: Don't Reward Yourself
Trust me never reward yourself with watching Netflix, reward yourself with something that won't result in insomnia.
Step 4: CONGRATS!!!!
Congrats on beginning the road to reasonable Netflix hours.:D