If you review a document, it means you read it and examine it (and maybe have some ideas to improve it) - but you don't make any changes.
If you revise a document, it means you change the text to correct errors or make improvements.
When preparing for a test, it's a good idea to study the material again in order to refresh your memory. American English speakers say you are reviewing for the test. British English speakers say you are revising for the test.
Online dictionaries often have audio examples so you can check your pronunciation and there are lots of great dictionary apps that you can take everywhere with you on your smartphone. Make sure not to become too reliant on these tools, though. Have a go at saying the words first then check afterwards to see if you were right!
So, with all these practice tips to choose from, which one are you going to try first?