I like to be on time on my events, instead of being ahead. Waiting 15 minutes is usually a waste of time when I can be reading some interesting news about SpaceX or programming in python at home.
However, some time ago I went to do an English exam, I think it was CELPIP. So I was going to be 15 minutes before the exam start – THIS IS A MISTAKE – but one station before the train actually stopped and asked everyone to leave. So there were so many people, although it was very nearby I could only get there 5 minutes AFTER! So no candles and no crying, I needed to book another exam. I wrote an email right away to them, but it wasn’t enough actually.
Lesson learned, now I go to places 30 minutes/15 minutes before and carry my poetry book.
My list for controlling anxiety
Turn off the cellphone’s 3G
Count, this makes your prefrontal cortex activate and relieve stress
Sing a song, either in your mind or very low
Do some exercises or stretching