In answer to a question from__ andywillers __I've tidied this Glitter Shader up into a simple easy to use node group.
The default settings give the result shown in the preview image although with adjustment the effect can be varied.
Base Colour: The material background (Diffuse) colour.
Glitter Colour: The colour of the glittery sparkles.
Glitter Roughness: Controls the spread of the glitter effect.
Shine Roughness: The glossy roughness of the sparkles. If set to zero lamps will produce no sparkles.
Glitter Scale: Size of sparkles. low values big sparkles , high values small sparkles.
Glitter Intensity: The brightness of the sparkles values between 0.1 and 0.5 give the best results.
Glitter Density: The amount of glitter, values less than 1 give spaces with no sparkles.
Texture Coordinate: If nothing is connected Generated texture coordinates are used.
This information is also included in the .blend