This is a dueling blog. Donna-Lane's version can be found at: http://theexpatwriter.blogspot.fr/2017/05/preplanning.html.
Years ago, I read the popular book, Dress For Success, by John Molloy. I see he now has a companion book for women, as well as a blog - http://www.thedressforsuccesscolumn.com/.
I don't read any of them. Don't need to. I'm pretty much out of that corpo-rat race, except when I speak at or attend a conference. For such occasions I still keep a suit in Geneva, another in Argèles sur Mer, a blazer and slacks at each, a couple of dress shirts, and a few ties, most of which have some sentimental value. The biggest decision I have to make for such events is whether to trim my hair ... a little ... so as to not be mistaken for homeless. (I prefer Bohemian.)
The one piece of advice I remember from Molloy's book was to not wear a green suit, so I never have.
Green pants, yes, on the golf course. Green shirts, too, with Masters logos. Though not at the same time. I'd look like the spokescartoon for Green Giant veggies.
Donna-Lane will tell you she plans her wardrobe well in advance. That she doesn't get out of bed without knowing what she's going to wear - including underwear and earrings.
My approach, once I'm out of bed, is to grab some clothes to throw on the couch just before I take my shower. That's about as advance planning as I get. Sometimes I wait until after the shower to choose.
My decision tree starts with ... is it warm enough for a tee-shirt? If so, what tee-shirt is on the top of the stack? Is it big enough to hide my belly? If not, go to the 2nd shirt in the stack. If it's too cool for a tee, segue to the golf shirts or something warmer. If it's really warm, shorts instead of jeans and sandals instead of sneakers. As a bonus, I can wear the same tee-shirt to bed that night. Or nothing.
I have started
to build a small collection of French language tee-shirts so I'm less
anglo when walking around France and Switzerland. But I'm never giving up
the now-threadbare WHWK "The Hawk" radio station shirt I've had since