I predict that Ron Paul and Mitt Romney will have first and second place in Iowa (who is first is up in the air), with Santorum third and Gingrich fourth.
Romney will win New Hampshire, with Paul in second.
Overall, Paul will get 15-25% of the vote. His percentages will not ultimately lose steam, but as the field narrows, his opponents will pull ahead somewhat.
Ultimately, the race will be between Romney and someone else (most likely Gingrich, but maybe not); Romney will dominate the non-southern states, and the opponent will do better in the south. I do not know who will win, but it will be close.
That is all.