Small angle scattering of neutrons (SANS) and X-rays (SAXS) is used to get insight into the shape, the internal structure and the interaction of aqueous solutions of micelles. Alignment of anisometric micelles via shear gradients, electric and magnetic fields facilitate any interpretation of the scattering patterns and are therefore a powerful tool for any kind of investigation. Transient alignment experiments give a rich insight into the dynamic response of micellar solutions, like phase transitions, Brownian motion, growth or decay of micelles and mutual interaction.