It's hard to get significantly ahead over break. Most people need the rest after the first semester of 1L. I don't think it's a good idea to hit the textbooks or commercial outlines during the break, you risk getting burnt out in April, May, and/or June. Try getting some lighter, law-related reading, like popular nonfiction about law, which will keep at least a bit of your brain in law mode, but you won't expect yourself to retain and remember that sort of stuff.