  The phenomenology of charge transport in synthetic metals is reviewed. It is
argued that the conventional quasiparticle picture and Boltzmann transport
theory do not apply to these materials. The central ideas of Fermi liquid
theory are reviewed, and the significant corrections produced by quasiparticle
scattering from ferromagnetic spin fluctuations in liquid $^3$He are described.
It is shown that Sr$_2$RuO$_4$ does not display the symptoms of a
nearly-ferromagnetic Fermi liquid, so the source of its odd angular momentum
pairing remains to be understood. The solution of an assisted-tunneling model
of charge transport in quasi-one dimensional materials is described. This model
has a quantum critical point and gives a resistivity that is linear in
temperature or frequency, whichever is greater.
