I guess ballot proposals. Stuff ballots with minimum wage, medicaid expansions, fluffy happy "second bill of rights stuff", marijuana, voting rights etc. Either that or attempt to move governor races to the Presidential year...
And try not to step on gun people's toes. It's a waste of time, and I really wish Democrats had spent their political capital on something, y'know, useful.
Like I said in an other thread, pass gun control through referenda, not the legislature. If it's as popular as polls have us believe they will pass. And the anger can't be passed onto democrats as long as their politicians ignore the issue.