If you're planning to enter law school next year, then you're probably better off not investing the money right now. Law school is expensive, so unless you've got someone else paying your way, you'll probably want access to that money so that you can take out fewer loans for law school.
Also, I'd do some reading. Actually, a lot of reading. Anything from personal finance magazines (Kiplinger's, Money, etc.), to classic books (Random Walk Down Wall Street, The Intelligent Investor), newspaper columns (The Washington Post's Color of Money Column), and even blogs. Read until you know what kinds of accounts there are (taxable, tax-free, tax-deferred), what kinds of investments there are (stocks, foreign and domestic, plus bonds, treasuries, municipal, and corporates), and what different investing styles are (most investors here subscribe to the efficient market theory, and invest in index funds, but not everyone).