Part of that is supporting them when they come home. And that doesn't just mean "Hey, welcome back! Thanks for rescuing us from those WMDs/killing those terrorists/giving Iraq democracy" (choose your own personal justification).
No, that means taking care of them when they get home. That means health care, that means education. You can't cut health insurance, close hospitals and try to drown out veterans when they and their children suffer from illnesses and deformities related to depleted uranium that you weren't completely honest about.
So, don't say you "support the troops" unless you darn well mean it.
More on this later--kind of enraged at the moment.