I also read that to keep a journal for the trader is a must. It clearly shows your results and serves as a great way to correct your mistakes.
A regular review of one's trading journal is definitely important. Having your trades evaluated by other traders can be beneficial, too.
Yes that is right, it could let you have an insight into the things you miss. I personally feel that you can have immense profits in trading if you invest in the best project at the least cost. Normally in the bear market, when the economic activities fades away a bit, people start thinking that the market is dead or its era is over now but I think after the recovery starts and after the prices rise high, they invest only then which is not economically rational. Focus on cost minimization.