If only ,should have 

Over the many years in my dealings with people of all ages ,clients or otherwise
the most oft quoted words of regret or missed opportunities would invariably be "If only
I have bought or sold earlier ,later or should have done this or that and so on...I too
am no exception and do lament on occasions where the matter refers to family or personal
relationships.However I make an exception when it comes to the stock market..with the sound belief
that if you have done your homework sufficiently and have taken all steps necessary to make an informed buy ,hold or sell call ,you should not on hindsight rummage through your mind over and over again if the decision turns out to be a wrong one..This train of thought no matter how one views it is in my opinion
destructive and will greatly impair sound trading or investment judgements..ask anyone who has lost
big time in a casino and they will tell you the tipping point towards"losing it all ' is when the feeling of
"revenge " or wanting to recoup all their losses overcomes the mind and all hell breaks loose..
It is perfectly normal to feel frustrated on a bad call ,we are human beings after all ..but one needs to learn
to handle bad calls in a positive manner ( ironic but true ) ...this is more so if you an active trader where focus
and a clear mind is imperative for sound decision making...

Countless literature can be found on the internet as to how best one can learn to be positive ,realistic and so on in the face of adversity ...My 2 cents worth opinion includes the following ...everyone loses now and then
,nobody is right all the time and best of all treat each loss as a bad business decision and learn from it...apply a more " stringent" stock selection criteria and improve on your trading technique...will technical charts be sufficient or a more wholesome and all encompassing trading technique be used instead,,,whichever you choose is entirely up to you..as long as you remember a troubled mind is a defeated one ...if necessary
go for a break and come back to the drawing board later....