I use the Visual Studio 2010 DataBase project.
This is actually very easy to use and lets you schema compare the database with the project and the other way around.
It also delivers a Data Comparison tool that lets also sync the data on the database.
I tried to find a very simple tutorial about this on the web and I found this:
VS 2010 Database Project Introduction[
^]
I think this may be a good start point.
Cheers!
Alex