(Slightly more detailed instructions) Turn bottles into drinking glasses: soak heavy yarn in acetone, then wrap around bottle where you want to cut it 5-6 times. Light it on fire until you hear a crack, then run under cool (not cold!) water until it breaks off--make sure to continually turn it under the water, and you may need to gently tap it on the sink edge to get it to break. Then sand it down with fine-grit sandpaper until smooth enough to drink out of.
while abroad, send yourself a postcard every day from where ever you are and write on it what you did that day. once home, bind them for an instant scrapbook of your trip: complete with photos, stamps, and a run-down of each days events.