If you get into the habit of panicking, then you will inevitably sell low and buy high.
This is NOT what you want.
If the price drops and you think about selling - just don't.
Wait until it goes up again, and you will profit.
We are just humans and no matter how we have these pre-planned trading, emotions tend to be over above us. However, the more we do trades and teach ourselves to control that emotion, we tend to master it can just focus on the trading game plan.
Emotions are in a way important to enjoy the special moments of the life. Yes, practicing trading gives you good control over emotions.