Don't break your trading plan

Last night couldn't sleep and spent about 30 minutes looking Z (FTSE) and watching ES reacting to its move. I entry long, and when the trade was in +5 moved the stop to BE then I set the target and went to sleep. This morning I woke late and the trade hit the target +25.15 points. It is funny but sometimes my best trades are like this and the reason behind it is that I don't move the target because simply, I am not looking at the screen, I just set it up where it makes sense. The whole point is "Don't break the plan", so many times I get out too early and the market finishes at the price I initially set the target.