A few years ago, I was taking part in a monthly executive council meeting. Just as I was making an emphatic point about something, my hand clipped the top of my cup, spilling coffee onto the polished surface of the boardroom table.

My most vivid memory is of my boss, the CEO, flinging me a wad of napkins to mop up the mess.

In the end, my little faux pas was forgotten, and I've managed to keep my place at the ...