It is really sad to write on this topic but with my experience as a consultant and having seen in and out of various companies I am forced to write on this.

Some of the ten biggest mistakes that an investor or a promoter make in their business are:
1) Invest without understanding business
2) Pretend that they know everything
7) Put their recently graduated child in command
4) Listen and entertain all the rumours
5) Don’t pay the salary in time
6) Under estimate the competition
7) Mistrust their top executives 8) Doubt decisions taken by the Sales & Marketing Heads
9) Think they can handle situation better than their executives
10) Fire the main staff and people involved with the project since the inception of the idea

I am going to write all the point in detail but it just takes a lot of time and concentration. I will elaborate on each point really soon.