Get online or get a brochure from a travel agen! I always think it is a good idea to do a one day tour of any city - you get a chance to look at things that you might wish to go back to later.  I love Old Shanghai, The French Concession, the famous Nanjing Walking Street, The Bund ( must go at night!).

So much to see.  It should be easy to get around. Decent budget??? Depends.  So some searching on the net.  Going alone?  Need a hotel or apartment?  Many choices.  Could be a little expensive.

Have fun.  I love it.

Don't forget, there's an Expo in Shanghai from May 1 to October 31 this year. Can you delay your trip to enjoy that? The exhibitions will on the environment, and like the Olympics China is spending a lot of money on this. I would imagine you're going to be seeing a lot of stuff on this during a March visit. They've been making a bit of a fuss on television too; less than a hundred days to go. I'd stay on the perimeter, especially if you're coming in by train or the domestic airport, and commute by subway to Pudong, where the exhibition will be held. The subway system is top-notch. The closer you get to the Bund/Pudong, the more expensive it's going to be. Happy Trails!