Ok, actually two things: 1) What makeup can you absolutely not leave the house without applying?? 2) What do you ALWAYS have to take w/ you to work, school etc (besides your bag of course...i.e. - IPod, cell, lipstick, etc)? For me it would be mascara and l/s. I can't choose just one!!! I never leave the house w/o my Sugar-Free Red Bull and cell. I'm an addict and freely admit it!