How not to prepare for a test!

I personally can't stay focused on one thing because I get distracted a lot. So the whole sitting down at a desk for 3 hours thing isn't my thing but not studying at all is one way you shouldn't prepare for a  test. Watching TV until you get to the lowest level of boredom while you could have been studying is another way you shouldn't prepare for a test. Or count how many fish are in the tank when you could be studying. We can all use our time wisely to study it's just we don't know how to or when to.