I'm the worst packer. I always take too much and still somehow manage to get it wrong! I'm going to Malta in a week and forecast is some rain, some sun, around 18C, 11C at night. I can't think how warm that will be - is that chinos/jeans weather or more summer clothes weather? I'll take some layers, and a light rain jacket, but just can't decide on which outfits to take.
I usually take one top per day, but never know how many pairs of trousers to pack - how many bottoms would you take for one week?
This is assuming the fuel hasn't run out by then...