Last-Minute Asian Getaway

I am about to discover just how prepared or unprepared I really am. I was just offered the opportunity to travel to Tokyo and Shanghai for 10 days with most of the expenses paid! The only catch is that I leave next week!!! It is going to be a challenge to manage work and other obligations while I am gone, but I just couldn't say no to this fabulous opportunity! I have 7 days to figure out how to spend my time in these two fabulous cities! I will keep you posted along the way. Post to the comments if you have been to Shanghai or Tokyo and your favorite experiences there. Most of the days I am there I will be exploring on my own. What are your travel tips for traveling alone?