[brainwad]

As an Aussie:

* some kind of proportional representation in lower houses or parliament (see e.g. New Zealand for a Westminster-compatible solution, or Switzerland for something more radical while still working with seats allocated by state populations).

* referendums on laws/treaties, and popular initiatives to propose constitutional changes and/or new laws (like in Switzerland or various western US states).

* reinvigoration of the federal principle that things that can be done by the states (or the local governments) should be done at that level, rather than the feds sticking their nose in everything (see, again, Switzerland).