Squint until the chair becomes one dark shape and the window one bright one, then draw those first. Drawing the gaps between things, not the things themselves, often gets the proportions right without you trying.

Title each half-formed idea with the question it was trying to answer, not its topic. Later, you'll search for the question you were stuck on, and the note will surface.

Squint until the chair turns into one dark shape and the window into one light one. Then draw those two shapes first. Your eye stops arguing with the details.