When the task of writing becomes so overwhelming I can't even begin to write, I take it one sentence at a time. One word at a time would be too agonizing, but a well structured and/or flowing sentence puts me at ease.
One of the most beautiful sentences I have ever read is from Paul Thek's 96 Sacraments. The sacraments, hand written on journal pages, are currently on display at the Carnegie Museum of Art.
To fly away into the air about as high as a chicken can & then to come back.
I repeated this sentence to myself out loud three times when I saw it because I love the way the alliteration rolls off my tongue. Again, I'm put at ease. Not only by the words, though, but also by the image I conjure of myself flying away in the air about as high as a chicken can, and most importantly, of coming back.
Sentences help me come back to where I am in my writing. All I need is one to build off of, and it doesn't seem so daunting.
In the author's note for my senior seminar project, I told my professor that I love to tell stories but I hate to sit down to write. But, y'know, I think that is only true the more I avoid sitting down to write. When words start hitting the page, I feel lighter, and I feel worth something more to myself.