Being diligent and thorough with your trading, and keeping detailed records will be a tremendous help and allow you to go back and really pick apart things the things that are working from the things that are not.
Finally decisive action is an important quality to have when developing as a trader. A good trader has trained his eye to spot potential forming trends. Often times when a clear trend is established it is already too late to enter in the trade. The business is trading and treating it as such will be the first step to becoming successful.