What do I do to keep calm? I'm writing articles like this one :P
I know, it's shameless self-promotion, but I couldn't withstand the temptation.
Just stay calm and don't panic. Try to sever the emotional connection between your invested money and yourself. That makes it way easier.
You got me at a good mood so I checked your article and even gave a little upvote :)
That is very much appreciated. Thanks a lot! :)