My standard packing list for 1 adult 1 week (7 days 6 nights) no clothes washing:
8 pairs of underwear in a style and colour suitable for your clothes
6x bras in a style and colour suitable for your clothes and activities
8x socks suitable for walking
2x PJ. If you sleep in the nude take at least one or a dressing gown in case there is a fire alarm in the night and you need to get out pronto
2 x bathing suits if you are intending on swimming
pack 3 pairs of shoes: flipflops if you're swimming, smart shoes for dinner, proper walking shoes and wear the trainers on your feet for the airport
1x scarf
1x hat
1x smart dress or more if you are going to have fancy dinners
1x tights if you wear tights with your dress and goes with your smart shoes as it might be chili at night
4x bottoms
8x tops
1x raincoat thin
1x jacket or fleece
1x backpack
1x water bottle
1x chargers and battery bank
Jewellery if you wear any but don't bring anything too precious.
1x your dental kit (charger too if it's an electric toothrbrush)
1x your make up kit (including make up remover)
1x your hair kit (hairbrush, bobbles etc, I find the hotel's shampoos are very drying. You could also buy these when you're there)
1x your hygiene kit (sanitary products if needed, nail file and clippers, ear buds if you use them, deodorant, razors (buy the foam or use a shaving bar as it might explode from pressure, if you wear contact lenses bring glasses too and your cleaning solution and eyedrops etc...)
1x empty plastic bag for dirty clothes
Plug adapters for switzerland, ear buds for noise, eye mask
Book or kindle, music playlist or podcast.
Pen and paper (small notebook?)
Any medication you take and the prescription for it.
Plasters and foot blister stuff (compeed)
A lot depends on your activities and how low or high maintenance you are!