Haste makes waste.

So take a deep breath and relax. Don't lose your temper. Don't hammer the lift door just because they've neglected to hold the lift again. Don't shout at the person next to you, even if he's shouting incoherently. Don't mutter under your breath either. Don't break a sweat and have your fingers turn into jelly, even if your glasses are completely fogged up and you can't see a thing. No worries. Just take another deep breath, remember to continue relaxing, and never lose sight of what is written in big, friendly letters on the cover the Hitchhikers' Guide: 'Don't Panic'.