Introduction:

How to Analyze Your Mistakes:

1. Always time yourself. If you are not timing yourself, don't bother reading further.
2. Save every question you miss/get wrong/guess - my suggestion would be to print every one of them out and build a binder you can grab at any time. You can also look into using an online solution of sorts or an error log and expand it. GMAT Club forum has its own error log that contains every question you practiced on the forum
3. For every test/quiz question that you miss or guess, you should ask yourself the following questions:
   
   
   
   • Why did I make this mistake?
     Write a reason for making a mistake - figure out exactly what it is! For example:
     
     • Is it not knowing something?
     • Forgetting a formula?
     • Confusing concepts?
     • Not reading the question carefully?
     • Not following a strategy?
     • Not recognizing a correct choice A in SC?
     • Making a silly mistake?
     • Rushing?
     
     
   • What did it teach me? What did I learn from it?
     Each error is a learning opportunity - use it. Don't just say - it was a silly mistake or I made a calculation error but turn it into something more meaningful. Here are a few examples:
     
     • You learned that you tend to make calculation mistakes when you do math in your mind or you tend to miss some important words in PS or CR questions
     • You forgot not know the Triangle area formula
     • You learned a shortcut for arithmetic
     • You understand inference and assumptions now and see the difference
     • You hate RC
     
     
   • What do I need to do so that I never make it again?
     The next step is to turn it into an action item. Here are some examples:
     • How do you ensure that you never make that silly calculation mistake? Well - you always do all math by hand.
     • Still does not help? You double-check your math when doing word problems or you backsolve to make sure.
     • Are you skipping important words in CR? You should make a rule to always check for keywords in questions on your CR.
     • Are you not sure why C or D answer choice in CR? Don't leave the question until you know - most likely that question is discussed in the forum - find it and figure it out. If you can't tell a difference in a CR or RC question answers - that's a sign of a much bigger problem that you need to address ASAP

Other Suggestions For Mistake Review:

• Periodically go back to the questions you got wrong, esp the hard mean ones that you did not know how to even approach and make sure you can solve them and know the path to solve them and the key to the solution.
• Most likely you know there is a dark little secret about your mistakes, for example, you always miss DS questons or struggle with geometry - that's where you need to camp out and dig until your hand bleed.
• Don't get overwhelmed. You may have a lot of ground to cover; try to stick in one area as much as possible before moving on

:!: Next Steps:

• You can head over to Question Banks and practice 5-10 questions on each topic you messed up and see how good quality of patching you have done
• Alternatively find similar questions and practice them! It is quite easy - find the question that cause you pain in the forum. Then, click "Find Similar Topics" link and you will have a collection of questions to work with. Be careful practicing GMAT Prep questions if you are still taking GMAT Prep as that may inflate your scores. Here is a screenshot how to do this:

Spoiler: ::

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What do people usually do wrong:

What mistakes are you making?