on writing: finishing your book
"There are two of you. One who wants to write, and one who doesn't."
– María Irene F.
Try a Draft Zero (my favourite way to draft). Open a document and put the bare bones of the story down. Outline, characters, their arcs, pieces of dialogue you already know will come up. This is good when you find it difficult to write descriptions and internal thoughts. Draft Zero gives you the space to focus on the plot, to tie all loose ends, set up a complete foundation of the story. You then add more detail in the next draft.
Write the fun parts first! If you know how the story ends or you're looking forward to writing specific scenes or dialogues, write those first. Make notes about skipped scenes to come back later, use special characters for easier search.
Have another document or a notebook for edits as you draft. Note things you want to change or add (e.g. foreshadowing) in a separate media / document because adding them into the draft right away could get you out of the flow of writing.