Packing. I take about a week. Bag/suitcase put on spare bed then things dropped in as they come out of laundry or when I'm in a wardrobe or drawer that I'll need something from. Toiletries generally last as they go from being in use to packed. Always take more polo or T shirts and underwear than I need, and would no more wash anything in a sink on holiday than I would at home.

Unpacking takes a similar time. Clothes needing laundered go straight there, but everything else just when it's needed or I'm passing by.