Consumerium levers are the things that change more rapidly than Consumerium:Itself, or more slowly. By understanding and using them, one can change policy to speed things down, or slow them up. ;-) They are the most important organizing tools, although they are not necessarily the most important organizing methods that you will use in real life.
Factions will often debate the levers rather heavily.
A good guide to where to find levers is the en: Meta-Wikipedia: twelve levers list.