I guess I'll make my first post here.
This is all speculation, but this is what it looks like to me along with a few comments from Ron Paul or his spokesman report from some articles.
First, it seems Paul is aiming to become the "Anti-Romney." As an article mentioned somewhere before, there's two primaries. The Republican Primary and the "Anti-Romney" Primary. As Romney just stands around the reluctantly supported frontrunner, other candidates have been trying to establish themselves as the second power and after cementing that, then work on facing Romney. You have seen so far, no candidate have been that stable. Though you can see Paul is approaching that.
I also noticed a sign that Paul was hoping for a "front-load" plan. Paul's campaign did said that one thing they switched from 2008 abandon the 50-state national campaign to an organized Iowa-NH campaign with focused resources and top-notch ground game. I looks to me that Paul was hoping to take Iowa and then a mix of luck, momentum, and ground game take NH from Romney's feet. Taking those two states momentum, it was perhaps he can make a final blow in SC and make a quick end. An article - kinda negative but still - quoted Paul that he was hoping it to be short. Sounds like there was hope for a decisive early victory.
Obviously, that didn't quite worked out. But it seems they are going with the "Anti-Romney" plan. It looks to me that the Plan is to keep "nipping at his heels" until threats from other candidates is whittled out. People have noticed that Romney and Paul are not attacking each other much. I think there's a detente going on there as Romney rather face Paul and Paul rather face Romney than a divided field assuming he can cut him enough to make other other competitors be closer rivals. I think it adds credence to that. Between now and the final showdown, the plan is to take out the other rivals while making the most of the proportional delegates and then try to win some caucuses where he can leverage support better. By that point, by March after starving out the rest and having enough delegates to remain competitive despite not winning any primaries, Paul can go mano-o-mano and aim to win primaries as the Anti-Romney. Ideally it would be a front-loaded campaign, but since the Media and Santorum put a stop to that, it now trying to make the most of the respectable finishes of the two states and generate momentum from that. And so far, it looks like it been making progress. It would be good if Paul can outright take SC or Florida, but if he can't, he can just stay close, Paul might be able to take position as the Anti-Romney and win that way in a more drawn out proccess.
At least that's my speculation.