When I have 100-hr work weeks, I have one thing in mind: maximizing sleep. I've had lots of busy weeks like this, unfortunately, and I've perfected a routine that helps gets me through. From the outside, it appears as through I've had a full night of sleep and ample time to get ready.
My morning routine is 20 minutes from bed to door:
-Wash face/brush teeth
-Run wet fingers through hair, then comb through with mousse into ponytail (mousse makes hair look wet/freshly washed all day)
-Pearl necklace, watch, diamond stud earrings
-Foundation and concealer - fresh, perfect skin is an absolute MUST if you want to look like you're able to handle your work hours with no problem
-Brooks Brothers non-iron dress shirt tucked in to black slacks or skirt
-Grab my food (pre-prepared meals from the weekend), phone, wallet, and out the door
I look exactly the same every day--I consistently wear a smooth, fitted dress shirt with nice jewelry, neat hair and clean skin. Looks like I actually had time to get ready.
On the subway I read the main headlines of the paper and eat my breakfast (something easy like a bagel or piece of toast).
Works out well--I arrive on time every day with a full belly, looking and feeling tidy, and informed of the day's headlines. And even though I'm dying for a nap on the inside, I appear a lot more prepared and ready to work than my peers.