This is one of the most valuable article I found in my research. So I thought to share it with you all as it is worthy. Hope this article will help you to take same good decisions in investing.

It's overall theme is :

Principle 1 :

Always Invest with a Margin of Safety.

Principle 2 :

Expect Volatility and Profit from it.

Here are two strategies that suggested to help mitigate the negative effects of market volatility:

a)   Dollar-Cost Averaging.

b)   Investing in Stocks and Bonds.

Principle 3 :

Know What Kind of Investor You Are.

i.e;        a) Active Vs. Passive.

             b) Speculator Vs. Investor.

1. Speculators are typically sophisticated, high risk-taking investors with expertise in the market(s) to which they are trading and will usually use highly leveraged investments such as futures and options.
   

You're right  frustrated !

Because of fear sometimes I sold the stocks when they are in bottom only where there is a chance to go much up.