I recommend Aswath Damodaran's valuation course: http://pages.stern.nyu.edu/~adamodar/New_Home_Page/webcasteq...
If you don't have time for the full course, I've also heard good things about Damodaran's Little Book of Valuation.
If you don't have time for the full course, I've also heard good things about Damodaran's Little Book of Valuation.
If you check out the email archives [1], you'll see that Damodaran wrote this in the first message: "1. Preclass work: I know that some of you are worried about the class but relax! If you can add, subtract, divide and multiply, you are pretty much home free… In are you have forgotten your accounting, I have added my version (which would probably not be approved of by your accounting professor) of an accounting class to my website: http://people.stern.nyu.edu/adamodar/New_Home_Page/webcastac... If you want to get a jump on the class, you can go to the class web page: http://people.stern.nyu.edu/adamodar/New_Home_Page/equity.ht... "
[1] http://people.stern.nyu.edu/adamodar/New_Home_Page/eqemail.h...