Just a quick one off funny (language warning!) for those of us who have this problem every time we travel.
It's taken me years, but now I roll instead of fold, and I can definitely fit more in my luggage. We recently spent four days in Barcelona and I did it all with one carry-on (so proud!). I even bought back two tops that didn't get worn, AND three new tops, as well as souvenirs (and a bottle of booze from the airport duty free - well, of course!).
As always, The Oatmeal, has totally nailed the problem ...