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Layering is the technique that autumn requires and that most people do imprecisely. The principle is simple: each layer should do a specific job and be visible in a way that contributes to the composition.
Within each category, the specific choice should reflect your actual aesthetic rather than a generic version of the type — but there are some principles worth applying regardless.
On stepping outside your comfort zone specifically: if your default is solid, neutral separates, add one printed piece and keep everything else where it is.

