My friend has just started to do this preparation, and he says it's pretty good. Maybe it would be helpful for you too.
One month is quite enough for the Verbal Section.
Vocabulary :
Download Flashcards for Vocabulary practice (
Magoosh). Trust me it's quite extensive.
Fill in the sentences :
1 blank : They are easy to crack and mostly Vocabulary based, so would be covered in Vocabulary practice.
2 Blanks : Same as above.
3 Blanks : Practice approximately 10 questions everyday and try to grasp the concept, how each blank is related.
Passages (RC) :
They carry the most weightage in marks. One small passages has 3-4 questions related to it, while a long passage has 7-8 questions. Practice about 5 Long passages and 5 small ones. Make sure you don't take more than 15-17 minutes for each passage.
Critical Reasoning (CR):
They are of types : Strengthen, Weaken, Paradox, Related. Practice about 5 of each types you get. Do not take more than 10 minutes.
If you practice constantly for 4-6 hours everyday you will have a good deal of preparation. Also, practice each of these mention targets concurrently and not one after the other. Vocabulary too. Finish them part by part. Overlap the syllabus.
If you can: Practice from these books is a must: Official Guide by GRE-ETS/Manhattan Review set of 8/
KaplanEssays:
There are two types of essays and you get 30 minutes each to formulate and type in your views. So read about 5-8 Essays everyday, each from Reason and Argument types. You will get many sample GRE essays online. Once you go through some, you will get an idea how to formulate your answers.
Tests:
Join a test series and every week set aside 4 hours for the test. Two tests per week would be enough.