There aren't many forms of obligation I support being levied against citizens of any country.
Here's a rare one I found that I agree with.
Several countries, including Australia, have compulsory voting laws.
In case you don't know what that means, it means you are not just eligible to, but legally obligated to vote in elections.
I think, if the voting procedure were made less of a time investment (Go to polling booth, wait in line, cast vote) and everything could be done by mail or (better yet) the internet, our political landscape would be changed for the better.
Every voice (Or near enough as makes no difference) in the country would be heard and parties would have to work harder to continue to appeal to their constituents. Instead of a Republican who hated Romney simply staying home on election day, they would HAVE to go to the polls and cast a vote for someone other than him.
Every vote lost would directly translate into a vote for someone else.
I think it would be a great way to force the Republican party to turn around and make itself relatable to the masses.