Aplia-- This website has practice problems for you to do that comes with explanations on how to do them.
Statistics for Dummies-- This gives a run-down of different formulas and concepts.
GO TO CLASS!
ASK QUESTIONS!-- someone is probably wondering the same thing!
Do the end of the chapter problems
Create your own problems by substitution numbers!
Look at the book and your notes a little bit everyday
Stay up-to-date with your assignments!