Loss in trading

Loss in trading without a corresponding gain in knowledge is the only true loss

Doing as post mortem of what happens and framing the rules clearly in your own words is a good lesson. Eg. Never trade against the trend. Checking if at your entry point you would be able to make profit after brokerage.
In a range bound market for eg your exit at breakeven or profit should be within the upper Bollinger Band...simple things like this. remember even if you have success without a good system you may give it up in trying to learn the lesson you learnt now,so either way it is the same lesson that has to be learnt. Persevere and you will make it.
I always stress that without a trading system having technical analysis features say Indiabulls PIB or Sharekhan TradeTiger you are trading blindfold.