That's some good advice! Some more that have been given to me is to just start writing down what's on your mind! Down to every single detail! I wouldn't recommend showing this to anyone, since a writer's mind is a scary place, and the only ones who should see it is you and you only! It sounds a bit scary, but it gets you back to writing!
Another thing is just to take a break! We all need them sometimes. A little break to go eat a snack, go to the restroom, or play thirty minutes of your favorite game can really get the creative juices flowing!
~AQ