Yes, I'll tell you why. Economics is cool in the way you almost guaranteed a question on one half of the subject and another half of the subject. So, you can study hard and try to achieve your best potential grade.
But, if you find that you are handling too many subjects at once if you may be repeating more than one, you could opt to study just one side of the subject Microeconomics or Macroeconomics in detail, while causally studying the other. This will be less stressful and being honest with you you can achieve the highest grade of you study all the topics, but you may still possibly get up to 80% doing the latter.
In terms of study tips, I have wrote a guide for Studyclix.ie with advice on students studying Economics, I hope it helps!
Good luck! Adam.