A bad habit I am trying to change

I am trying to change the way I read. I keep on reading while laying down and that damages my eyesight. I already wear contact lens and my eyesight is still getting worse and worse.

I am trying to change that by reminding myself over and over again to not lay down while reading a book and when I catch myself doing that, I tell my mom not to allow me to play video games for the entire rest of my day. That is the habit I am trying to change the most.