Do you guys keep track of stored procedures and database schema in your source control system of choice?
When you make a change (add a table, update an stored proc,
I highly recommend maintaining schema and stored procedures in source control.
Keeping stored procedures versioned allows them to be rolled back when determined to be problematic.
Schema is a less obvious answer depending on what you mean. It is very useful to maintain the SQL that defines your tables in source control, for duplicating environments (prod/dev/user etc.).