Still Life by Sam Taylor-Wood - A real life vanitas still life with an exquisite, simple meditation on mortality and beauty. The addition of a supermarket peach and a Bic pen prompts questions about modern attempts at immortality.
VALUE Toast gradient. Human eyes can perceive 255 distinct levels of values (shading). If someone can find toast with 15 different levels, surely you can have more than just 3 or 4 in your drawings and paintings.