Thinking through this answer, 10 minutes is quite a lot of time.
1. my mobile - so I'd have everyone's contact details.
2. my external hard driver - for all my photographs and music.
3. my convention folder - for the only half-decent photos I have of me.
4. my mp3 player - because I love my zen, it's brilliant and you can't get them anymore.
5. my car keys - do I need a reason for this one? There are so many.
6. draw of childhood photographs - to keep some happy memories.
7. enough clothes to keep me going.