Something that might be helpful would be to read how other people prepared for the GMAT (especially the high scorers). From there, you can tailor a study plan that addresses your weaknesses.

Thanks for your quick response People .
Ok, listed below are the topics i intend to cover in Quant...Please let me know if this will suffice, Also, please let me know if I'm missing out on anything important.

NUMBER PROPERTIES

DIVISIBILITY & PRIMES: Factors, Multiples, Prime Factorization, Factor Foundation Rule, Prime Boxes, Prime Products, GCF, LCM
ODDS & EVENS: Sum, Difference, & Product Rules, Two Prime Sum Rule
POSITIVES & NEGATIVES: Absolute Value, Product & Quotient Rule, Systematic Testing
CONSECUTIVE INTEGERS: Series Counting, Series Sum, Series Average, Special Products, Special Sums, Series Divisibility
EXPONENTS: General Rules, Special Bases, Simplifying & Combining Exponential Expressions
ROOTS: General Rules, GMAT Root Convention, Simplifying & Combining Root Expressions, Imperfect vs. Perfect Squares, Common Roots & Cubes
PEMDAS: Order of Operations
STRATEGIES FOR DATA SUFFICIENCY: Sample Data Sufficiency Rephrasing

FRACTIONS DECIMALS AND %

DIGITS & DECIMALS: Place Value, Estimation, Powers of 10, Last Digit Shortcut, Heavy Division Shortcut, Decimal Operations
FRACTIONS: Simplifying, Multiplication Shortcut, Reciprocals, Cross-Multiplication, Splitting Denominators, Benchmark Values, Smart Numbers
PERCENTS: Percent Tables, Percentage Change, Successive Percents, Percent Formulas, Percent Mixtures
FDP's: FDP Connections, Conversions, Common Equivalents
STRATEGIES FOR DATA SUFFICIENCY: Sample Data Sufficiency Rephrasing

WORD PROBLEMS

ALGEBRAIC TRANSLATIONS: Translation Techniques, Variable Organization
RATES & WORK: RTD Charts, Average Rate, Simultaneous Motion, Clicking Charts, Basic Work, Working Together, Population
RATIOS: Labels, Proportions, Unknown Multipliers
COMBINATORICS: Factorials, Anagrams, Permutations, Combinations, Constraints
PROBABILITY: And vs. Or, 1 - x Shortcut, Domino Effect, Winning Scenarios, Counting Methods
STATISTICS: Average Formula, Median, Standard Deviation
OVERLAPPING SETS: Double-Set Matrix, Sets & Percents, Sets & Algebraic Representation, Venn Diagrams
STRATEGIES FOR DATA SUFFICIENCY: Sample Data Sufficiency Rephrasing

EQUATIONS AND INEQUALITIES

BASIC EQUATIONS: One-Variable Equations, Simultaneous Equations, Mismatch Problems, Combo Manipulations, Absolute Value Equations
EXPONENTIAL EQUATIONS: Even Exponents, Common Bases, Common Exponents, Eliminating Roots
QUADRATIC EQUATIONS: Factoring, Disguised Quadratics, Foiling, Undefined Denominators, Favorite Forms
FORMULAS: Plug-Ins, Strange Symbols, Unspecified Amounts, Sequences, Patterns
FUNCTIONS: Numerical Substitution, Variable Substitution, Compound Functions, Unknown Constants, Graphs
INEQUALITIES: Basic Inequalities, Even Exponent Inequalities, Absolute Value Inequalities, Combining Inequalities, Extreme Values
VIC'S: Variables In Answer Choices, Tracking Charts, Target Numbers, Equation-Based VIC's
STRATEGIES FOR DATA SUFFICIENCY: Sample Data Sufficiency Rephrasing

GEOMETRY

POLYGONS: Quadrilaterals, Interior Angles, Perimeter, Area, Dimensionality, Surface Area, Volume
TRIANGLES & DIAGONALS: Side-Angle Relationships, Triangle Theorems, Isosceles & Equilateral Triangles, Special Ratios, Polygon Diagonals
CIRCLES & CYLINDERS: Circumference, Arc Length, Area, Sectors, Inscribed & Central Angles, Cylinder Surface Area & Volume
LINES & ANGLES: Intersecting Lines, Parallel Lines, Exterior Angles, Transversals
COORDINATE PLANE: Slopes, Intercepts, Distance, Quadrants, Perpendicular Bisectors
STRATEGIES FOR DATA SUFFICIENCY: Sample Data Sufficiency Rephrasing

6 month prep is a long time pal, try 3 months, if that doesnt work you can take it again.

I am saying that out of exp. i prepared for 6 months and totally screwed up and ended with 620.

I think with GMAT u have to be good with concepts and GMAT concepts shouldnt take more than a month to learn/practice. The take test for 2 months.. Again, diff ppl have different schedules

Agreed ! I'm 3 months away form the actual test and I'm already burned out.
I just took the POWER PREP today( for the fist time) and a disappointing 500.
Needless to say I wasted my first 3 months. Now what ??????????
I ran out of time for quant...could not pace myself, Got a couple of CR and RC's wrong ...Overall disastrous 500.

Anyways, How acurate is the Power prep as opposed to the GMAT Prep?
Also as always PLEASE HELP !!!

powerprep is a decent indicator. what was your breakdown between Q and V?

Although I just have 3 posts to my credit , but I do visit the site almost everyday. Right now I'm improving on my weakness ,( Inequalities, Probability, Permutaions and Combinations and Distance problems)...Those are a LOT already
I'm going back to the basics of SC from the Manhatten Guide for Verbal and Needless to say I'm doing the 1000 series for both Quant and Verbal...
It's a new start all over again...
your thoughts???