I'm heading to Germany for a week, leaving tomorrow. The first few days are a conference in Heidelberg (at which I am giving a talk) and the second half is tourism in Berlin. I think I can manage with a single carry-on. I collected everything I might bring into a pinterest board:
http://www.pinterest.com/monochro/travel-capsule/

Items:
shoes: flats, ankle boots, tall boots (comfortable for walking, good for rain)
bottoms: 3-4 pairs of jeans, knit skirt, leather shorts
dresses: shirtdress, t-shirt dress?, drapey knit dress
tops: assorted
warmth: lightweight wool cardigan
jackets: denim, leather?

Scenarios:
wandering the city: jeans with tall boots, basic top
low-key nightclubs: leather shorts, silk blouse or wool top, ankle boots
giving my talk: white button-down tunic, black straight jeans, flats
hanging out with scientists: assorted
restaurants: assorted

I love everything in my list right now, but I worry that I'm overlooking something. E.g., will I be too cold? (Probably not. I run hot.) Will my ripped boyfriend jeans be inappropriate? (Again, probably not - Berlin is full of young hipster types.) Will I fit into my jeans? (A good question but I am ignoring that problem.) Am I bringing too much? (Probably.) Will I be underdressed for clubs?

If anyone has favorite edgy boutiques, etc, in Berlin, let me know! I'm looking forward to visiting COS in person, and I also noticed that Zara prices are much lower there than here. But those are both chains I can get here...