Please don't take my advice as the final word on everything, because the GRE exam is as much a matter of doing well on that particular day as anything else, and because I certainly am not an authority on the subject.

It feels strange for me to give advice about studying to someone else, but I do hope that I am able to help you. You probably know the parts of the GRE exam by now..and you probably know your problem points too. Try to identify those and concentrate on them. Following is a list of all the resources I used for studying the different sections: 

1) Verbal : 

A. Word list (For antonyms and analogies) - Learning the word list in Barron's is an absolute MUST. However there is a *much* shorter word list in Kaplan that I think you should also study. All the antonyms and analogies (except 1/2) that I had in my actual test were included in the Kaplan list and as I said before, its very small and doesn't take much time to do after you have completed the Barron's list. Also the "hit list" in Princeton is quite good. (see below) 
B. Reading comprehension - Read the guidelines about how to go about reading passages from Kaplan. There is a definite method in reading passages. However, In my exam I had two very long passages (>150 lines each ! - don't worry: I myself don't believe it) and probably lost a lot of marks in this section. 

2) Quantitative: (most easy section) 
Most of the theories in Quantitative have been covered in the 10th and 11th stds. Read the Math summary in BOTH Barons and Kaplan. In addition , also read the following topics from the standard college textbooks (don't read too much in detail... the problems on these topics are usually simple : 
* Combinations (very imp), 
* Permutations, 
* Probability, 
* Sequences, 
* areas of various geometrical figures (also given in the summaries of the GRE books), 
* Indices and the co-ordinate system (imp.. esp. read the formula for slope of any line.. all my friends and me got 1/2 questions based on that formula) .

 Note that I had got Q from the above topics in my exam. However they were usually simple E.g.. In how many ways can 3 coins be chosen among 10 coins and so on... But you do need to revise these topics superficially in order to answer the questions. In Quantitative and Logic games (next section ), the more you practice on the actual questions the better.

 3) Analytical :

A.  Logic games : Read about the method of solving logic games from Kaplan. Do NOT read from Barron's. Many of the examples given in Barron's are WRONG. (especially in the Practice question sets). This is not only my observation but of all my friends as well. Its best if you don't touch the Analytical section in Barron's at all. Anyway, if you buy all the things i suggest below, you will have so much material that you won't even find time to solve the Barron's papers. 

IN THIS SUBSECTION THERE IS ONLY ONE PRINCIPLE : PRACTICE , PRACTICE AND PRACTICE. 

B. Logical reasoning - This is the section that gives many people the most trouble. In this case to DO NOT *DO NOT* read the explanations from Barron's. Read about the method of solving them from Kaplan and study the practice examples given there. Also, in the CDs that I mention, there are two programs from ETS (Powerprep version 1 and version 2) . Study deeply the examples given in that too. Even after you solve the full tests in ETS, read the correct answers for the logical reasoning questions, even if you dont read anything else. 

For Practice of all the Sections: 

1) Kaplan : 
Questions given in the book and ALL the exercises given in the CD . 
2) PowerPrep (version 1 and 2) : 
Along with Kaplan, This is the MOST essential software for the GRE. BE sure to solve *ALL* the examples and full exams . Also be sure to study as much of the answers as you can, especially of the logical reasoning questions, in both Kaplan and powerprep. 
3) Barron's : 
Solve the math section from the book. Solve the verbal section too if you find the time. But DO NOT solve the analytical section. Please take my advice on this : do not touch the analytical section in Barron's. 
4) Arco : 
Solve all the sections and exams in the book (very good, but they are a bit simpler than the actual questions on the exam : keep that in mind) 
5) Princeton : 
Very good software. Almost as good as Kaplan . Solve the practice questions as well as the full exams. Also have a look at the "Hit list" in the verbal section. I thought it was quite good. 

Other software : 
1) Peterson : 
very good, But questions are given in the old paper and pencil format with very little time. But the quality of the questions itself is very good and its very good practice for all the 3 sections to try and solve them a bit ahead of time. 
2) Barrons : 
The questions are ALL repeated from the book. DO NOT use this software. Repeat the Questions in Kaplan and ETS instead. 
3) 800 score.com : 
This is a little known software that I bought over the net. The quality of the Questions is VERY good .The questions are a bit harder than the actual exam questions. But it is VERY VERY good practice. Download and install the free trial version from www.800score.com You can buy the software if you like the trial version. In my opinion, buying the software is worth it.

Things to get: 

Books : 

1) Kaplan ( approx Rs 650): most important ..read from first page to last. 
2 ) Barrons (approx Rs.300): for the word list and math summary. 
3) Arco (approx Rs 300): practice questions . The guidelines for solving Logic games is also good. But its not essential to read that if you have already read Kaplan.
4) Big book ( I don't know the price, but it should be around Rs.1800 : Try to get it xeroxed from someone) : I have not seen this book. It is published by ETS and contains the questions of a lot of the previous exams. Although I think it must be a good book , many persons who have read/solved it say that the difficulty of questions in the computer based test is more than those in the pencil and paper based one (whose questions the big book contains...). I really can't comment about this book.But i think you SHOULD buy it and solve the examples if you have the time. It might be useful especially for the logical reasoning questions and the Logic games.