If you want to change anything, you should probably start by voting more than every four years.
Since you have nationally relevant elections every two years.
As well as State-level elections that affect those federal elections, such as governorships and State legislatures that decide congressional boundaries and voting rules e.g. need for IDs.
If Obama couldn't rally his coalition of the fairweather and fickle, I don't really know why someone else much less charismatic bringing in people who are temporarily interested in voting is going to change anything.
There's a lot of hard truths in this post. I interned for over a year with Obama for America (known as Organizing for America when the president wasn't running for election or re-election) and worked my ass off during the 2010 mid-term election. For those unfamiliar with Organizing for America - basically the president kept his campaign organization and infrastructure in place so that 1) his re-election bid would be a smooth transition for the coalition he already built and 2) the coalition built during the 2008 campaign would have an organization providing a delivery system and logistics for advocacy and agenda setting around the president's mandate.
We tried to keep momentum from 2008 going. But after the Affordable Care Act passed in March of 2010 a lot of people just fucking gave up. I was primarily tasked with volunteer coordination and training for my state and volunteer numbers significantly dropped in the spring. I spent the entire summer organizing seminars and training for potential volunteers whom had been active in 2008 but those numbers never recovered.
2010 was a complete disaster for the Democratic party. And we're still dealing with the fall out from that election to this day. We lost so many governorships and state legislatures to the Republican party right before the start of the next census. And now we have voting districts across the country unrecognizably gerrymandered to fuck.
We needed people to turn out in 2010 more than we did in 2012. The election between Obama and Romney wasn't even close, Romney got creamed. The mid-term apathy among Democratic voters has left me completely jaded.
EDIT - And support for Bernie Sanders continues to show that Democratic voters are their own worst fucking enemies. Who cares if the country goes to shit as long as my vote makes me feel good about myself, right? I voted for Hillary during the primaries in 2008, sucked it up when she lost, and then went to work to make sure Obama got elected. I hope others here do the same when the time comes.