stock

Its very slippery while you invest in stocks. I believe in principle of buying in low price and selling in high price..But there is also another funda to hold on ur investments before selling and wait until you get good margin.
Following article confirms the understanding..

http://www.rediff.com/money/2006/jun/19perfin2.htm

And I think this is true in all sectors..Even in job! Don't get into any job while market is good...:) Wait for good opportunity!