When life, art, or a particular work-in-progress seem overwheming, confusing, or especially difficult, I take comfort in these words from Rainer Maria Rilke's wise little book, Letters to a Young Poet:
"If you trust in nature, in what is simple in nature, in the small things that hardly anyone sees and that can so suddenly become huge, immeasurable; if you have this love for what is humble and try very simply, as someone who serves, to win the confidence of what seems poor: then everything will become easier for you, more coherent and somehow more reconciling. Not in your conscious mind perhaps, which stays behind, astonished, but in your innermost awareness, awakeness, and knowledge."
Trust. Simplify. Value the small things. Live fully in the natural world.
Whether it's a life problem I am wrestling with, or a story that will not take shape, or a painting that won't properly cohere, these are -- for me -- the things that help me move forward again, almost always.