Translation of herunter gehen

Although it is very cold, I love the fresh air there. After an hour and after finishing the getting dressed in warm winter-clothes I am usually ready for skiing. Normally I like to go out early.
As promised, I am sending you in the attachment a (very) little overview of some applications we created on Vocabulix. Please send me also some infos about your activities. When would be the best time to talk?
I spoke to my sister's friend and she told me I could stay at her place whenever I wanted. I then played Galaga on one of the computer machines and advanced to a very high level of the game.