there are many ways to pick a right stock. some are:
1. u go for a company whose p/e ratio is less. for this, u can buy a magazine like dalal street journal, etc and take their table where all the companies are classified industrywise. this will help u to see the average indl p/e and whichever co is having a lesser p/e u can choose the same
2. a company with consistent results but whose market value is less than the book value, like canfin homes, kothari products, suraj diamonds, etc
3. u can buy shares of the companies who show a quantum jump in results
(watch out quarterly results). u can see economic times, business line, etc., particularly when the quarterly results are being declared.