The two psychological factor which affect us while trading are fear and greedy. People who are obsessed with fear never stay in the market for longer period as fear makes them to exit the market before they get the market. The other factor is greedy which make one to stay in the market for longer period as their mind are predominated with the money they never get contend even though they get the upper hand and go on with the trade though the market condition is not predictable. If one is able to control these two factors whatsoever the state of market are, he may be able to withstand the market.
Regarding trading choosing the best stocks matters the most, in such case what one require is correct judgment. If one is emotionally affected then he will never make a correct judgment he goes in the way as his mind goes. If his mind is free from all those stress then there is a possibility of correct judgment which is the factor in selecting the right choice. So one must learn to control the emotion that seems to be the influencing factor while dwelling on the trading subject deeply.
If you take trading you are the boss, you no need to depend on any one you can just switch on the system or laptop, look into details, have a deep analysis of the trends in the market, get a clear cut report, plan properly, follow the best risk management, never allow the emotions to flow into your mind as it may affect you in precise judgment and be authentic in selecting a right choice. This is the best and easiest way for you to get the upper hand in trading, if you follow this simple and easiest way you are not far away from the success you are about to get the one you desired so far. So follow it you can trade without any hassle and get the best out of it.