Ron Paul is bringing people out to his rallies but son of a bitch - they can't spend 2 minutes filling out a registration card.
I think this bit is key, most of the individuals in that age bracket that I've spoken with don't view it as a couple of minutes one day and an hour tops (maybe longer if part of a caucus) another. "Voting" is this big abstract thing (sometimes even for those who have done it) because of the rhetoric that surrounds it.
As to the level of cynicism, they do not have and for the most part have never had a political party that represents them or that they can respect.
Think of all the shady things that have gone on already in the GOP this cycle, think of Ohio and how they changed the rules (totally legal) in a way that cut all but the establishment candidate out of the local race
after early voting had already begun.
Their whole political experience has been of profound corruption from both parties (you don't have to break the rules to play dirty when the system is set up this way, think of Newts special voting), on top of that there is the more and more intent push towards "party loyalty" (loyalty oaths in VA anyone?) and it really cultivates a sense of burn out. They see Paul stand up and say that "you have to go along to get along" is what's wrong with politics and that truth speaks to them but then they see/hear how they have to be involved in the party (often for a decade or more) and be friendly/respectful to those who are already in power there and that if they don't do these things they can't expect change... and honestly that's when many of them give up on using political parties to change things because for many it
feels like being asked to go along to get along, it's like being told "the only way to solve the problem is to become part of it."
Any wonder they've no desire to do it?
What I have had success with is putting things into perspective, and keeping the involvement threshold I suggest in pace with the individual I'm talking too.
For example if someone isn't registered to vote then getting them reg'ed and to the polls is where I focus (anything more involved I leave alone until they're comfortable with that step). Part of this is to make sure they know two key things
how little time it actually takes & second that being involved in the political process isn't an either/or choice with other action. (Put another way "you can vote on Monday and protest the entire political system on Tuesday, that's totally legitimate")
Most of the youth I've met who have any interest in the political system at all find compromise exceedingly distasteful. So it's important to show them how acting strategically isn't making a deal or supporting 'the lessor of two evils'. It's no coincidence that "Hope" and "Change" got Obama a great turn out from the youth vote.
I'm sure the folks reading this thread know many ways Paul will provide more real change than any of the establishment candidates ever could/would, what we need to do to get more youth participation (based on my own anecdotal experiences) is provide avenues of involvement which promote, as opposed to require, enthusiasm.
A few more technical notes, you can change party online in many (most?) states, you can even register to vote in some AFAIK. Get those web addresses and pass them out to the young voters you know, send them in a text or e-mail "take two minutes now to register via this link. Let me know when you're done/if you need any help
Thanks!"
Make it a mini social event, if you arrange to go with a group of them they're more likely to show up. Filling out forms is a lot like homework, you can know it is important and even
mean to do it but it's easy to say "I'll take care of it right after ____" until it's too late.
Go for what's most important to them, the issues that connect to how they live their day to day lives,
"Ron Paul is the only candidate who voted against SOPA and who supports laws that would keep the government from reading your texts without a warrant as they can now" speaks a lot more to the average youth voter than
"sound monetary policy is key to the economic well being of our country".
Also, and this is the source of my greatest success, go after the "super delegates" among the youth you know. For example my sister is highly social and quite well esteemed among her social circles. So rather than talking to 40+ people about Paul I've talked to her about Paul, focusing on the issues that speak most to her and emphasizing why
this election is an opportunity. Then asking her to talk with her friends about it. Because honestly her friends will listen to her more than they'd listen to me even if I said the same exact things.
I know everyone is different so your mileage may very but I hope some of this proves useful to other supporters here
It is a simple multiplication problem: One apathetic non-voter multiplied by a few hundred thousand like minded individuals equals a lost election. 
