You'll want to read about DBCC SHRINKFILE very carefully.

http://technet.microsoft.com/en-us/library/ms189493.aspx

In general, you don't want to shrink your database to the smallest possible size on disk. You want to leave SQL Server with plenty of space so that it doesn't have to auto grow much. The answer here has a lot of useful info:

http://stackoverflow.com/questions/4522719/to-dbcc-shrinkdatabase-or-not-to-dbcc-shrinkdatabase-thats-the-question

You'll want to read about DBCC SHRINKFILE very carefully.

http://technet.microsoft.com/en-us/library/ms189493.aspx

In general, you don't want to shrink your database to the smallest possible size on disk. You want to leave SQL Server with plenty of space so that it doesn't have to auto grow much. The answer here has a lot of useful info:

https://stackoverflow.com/questions/4522719/to-dbcc-shrinkdatabase-or-not-to-dbcc-shrinkdatabase-thats-the-question