Usually, I am the person who prepare for a trip beforehand. I learn how to get to an accommodation's location few days before the day flight. I pack my suitcase according to the list where I write down things I need to during my trip. So I would not spend money on things I already have in my house. I check few times the time flight so I will not miss it. I have the irrational fear of missing flights even when I check time several times throughout the day.
All companies suggest to arrive an airport 2 hours before, I arrive 3-4 hours before sometimes, because I am worried about traffics on the road.