Produce a Congressional agenda–like the Senate’s bipartisan children’s health coverage expansion–and allow the President to veto it.
Produce other bipartisan bills–like the Salazar-Alexander amendment to incorporate the findings of the Iraq Study Group–that the President will also veto. I suspect there’s a bipartisan energy independence bill that the President will veto as well, at the behest of his friends in the oil business. And that there’s a higher-ed tuition reduction bill that the President will veto.
In fact, I’d bet the Congressional Democrats’ abysmal ratings would improve markedly if they (a) showed an ability to work with moderate Republicans and (b) passed a positive agenda, dealing with issues the public cares about, that Bush will veto.