We do some variation on all of the above, plus a few others that help without any extra effort.
1. On waking up on the last day in the room, I pull up the sheet and bedspread or the combination sheet/doona cover that seems to be standard these days (what a terrible idea - you can't just have a sheet when spouse wants the doona) so you have a smooth surface and nothing can disappear in any folds. Also, given that most are now white or a single colour, you have a clear field for any sorting while doing that final pack. Anything left out is easy to spot.
2. In our suitcase we include two small cardboard boxes. One box is for all the electronic bits, chargers, cables, adaptors, bottle opener/corkscrew, pen knife etc. The other is for medications and any small personal items that you use on a daily basis. When we get to the room, the two boxes are removed and put on the desk or bench. As the boxes are readily accessible, you can find what you need without touching the rest of the suitcase and when finished using an item, it is easy to just throw it back in the box. When leaving, the usual question is "why is this box so easy to close?" and you then find that charger still plugged in behind the bedside table. We size the boxes so they fit in between those rails at the bottom of the suitcase. It's a good way of maximising the use of that space that might be wasted otherwise. We tend to travel with a single suitcase between the two of us, so we have one set of boxes for the 68cm case and another set that fits in the rail gap of the 78cm case. The ones we use fit on top of each other, so they sit in the corner of the case taking up less space than a pair of hiking shoes. When the cardboard starts to disintegrate, we just replace them with a new set. They get handled a lot, but we tend to get maybe 8 weeks of travel out of a box.