Congrats on achieving scores in the 720 range! As I'm sure you have read, the AWA and IR sections are not quite as important as your verbal and quant scores, so you are in good shape! Here are some tips concerning practicing for the AWA section.
The Analytical Writing Assessment (AWA) measures your ability to think critically and communicate your thoughts. During the AWA section of the GMAT, you will be asked to write an essay in which you will analyze the reasoning behind a given argument. You will have 30 minutes to complete the essay.
1) Review sample AWA templates. They will guide you in how to best format your essays.
2) Once you are familiar with the general format that your essays should follow, take a look at lists of topics of past AWA essays. You can find many at mba.com: Analysis of an argument topics (
https://www.mba.com/~/media/Files/mba2/t ... t-exam.pdf)
3) During each 30 minute AWA session, you should spend the first five minutes outlining your argument and the last 25 writing the essay. Select a few topics from each type of AWA essay and spend 5 minutes for each outlining your argument or analysis. If it’s an argument essay topic, what evidence would you offer to make your case? State a few examples to support your thesis.
4) When you feel you’ve created a few solid outlines, write a couple essays. Make sure to spend no more than 25 minutes on each essay. If you’re an Economist GMAT Tutor student, upload each completed essay through the Economist GMAT Tutor dashboard. If you’re not, you can register for our free trial, which includes one free essay critique.
5) You’ll get feedback from one of our academic tutors within three days. Don’t submit more essays during the time that you’re waiting for your essay feedback; wait until you receive the critiques of your essays so you can incorporate the tutors’ advice in your next round.
6) Repeat steps two through five.
Good luck!