Just some keywords for you to remember:
- Snowboarding/skiing equipment
- Maybe cross-country skiing equipment
- Helmet: if you have got some brain you should protect it!
- Alpenvereinsausweis if you are member of Alpenverein
- For Italy: insurance proofing document
- Shoes/boots for sledging/tobogganing (snowboarding-softboots e.g. are fine for most people)
- Sun glasses/lotion
- Various cables and adapters (VGA<->HDMI for beamer connection e.g.)
- Power distributors (Steckdosenleiste)
- Earplugs!!! (You never know who's in your room)
- Aspirin
- Immodium or else (Diarrhea stuff or so)
- Sauna fragrances
- Bathing trunks/bikini
- TYPO3 Flag
- Good mood!