I take the stairs. It's cheap aerobic exercise and putting one foot in front of the other still one of my lifetime's greatest achievements. Seriously, familiarise yourself with any building you enter; doorways, emergency equipment,stairwells, windows that are sealed or can be opened. Remember that most fatalities are from people stampeding and not the initiating threat. A recent archaeological investigation revealed the same phenomenon; rain,mud,sloping ground in a perfect funnel caused the defeat of the french at Agincourt and not Longbows. Every fatal fire reveals bodies stacked up at locked exits or trampled in narrow aisles. Elevators are the least of our concerns.