How do you draw inspiration?
...with a pencil and paper? Perhaps.
The key focus with writers block is to not let it take you under. If you continuously tell yourself that all you write is trash, then you may as well find a trash receptacle. The power of suggestion is widely underrated.
I have heard/read numerous sources on the subject; all saying you must write every day or your doomed. They are operating under the "If you don't use it, you lose it" assumption. While I do write everyday, I wholeheartedly disagree with that mentality. I think that the answers to questions are not always there, hence the big fat road block of the brain. Sometimes the concept needs to grow. The tiniest seed planted just before a block occurs, still buds, even though consciously it feels like you have nothing. By fleshing out your characters and mentally walking through the plot, you gain a tighter understanding of your story as a whole. Your subconscious does the majority of the work for you. At least, that has been my experience.
What else helps to aid that?
Paying closer attention to the details in your scene
Replaying the scene before the block over and over again in your head
Sometimes...it just takes time.
So, depending on how you as an individual operates, will determine how, why, and when it comes to you...that moment of absolute clarity.