My advice: stock up on firearms, ammo, components and learn Spanish.
'nuff said.
Thing is, I don't know how much ground-level support the Democrats will really have next election. It's doubtful that there will be much of a political swing in Congress anytime soon, and the Democrats have done alot of damage to themselves in the public eye the last ten years.
Even though they're extremely vocal, and they have a bunch of shrill and self-righteous celebrities (who are, after all, the REAL experts on policy) on their side, the Left has been losing faith with the average voter for quite some time. They're a vocal minority, but still a minority. People still remember the public-image damage done by Bill Clinton, Cynthia McKinney, etc.
On the state level, the trend is toward more gun rights in all but the usual Blue states. The recent protests and marches were meant to guilt people into feeling sympathy for illegal immigrants, but from what I've seen, all they've done is make people realize how huge the problem really is.
Best case scenario for the next election: Hillary runs, and the Republicans come up with a middle-of-the-road candidate. If the Democrats were smart, they'd find somebody moderate and obscure, but I doubt that. They'll most likely push an anti-war, pro-illegal immigration ticket, which will likely get all sorts of loopy celebrity endorsements and be couched in angry contrarian rheotoric. The average voter doesn't want to hear it.
The real concerns going into the next election will be unemployment, fuel prices and national security. None of these are strong points for the Democrats.