Best way to do this is to put your database code into source control. You can track it and version it that way. Further, once you start treating your database as code, you can start to automate deployments since builds from source control allow you to go from a known state.
"The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood"
- Theodore Roosevelt
Author of:
SQL Server Execution Plans
SQL Server Query Performance Tuning