It is a nice article. Concerning vertical partitioning I'd recommend SQL Refactor. It has a table split refactoring that takes a table, allows you to specify which columns should stay/moved/copied to a new table, what the future relationship will be (1:1, 1:n, m:1), and creates a script for you that

- create the new table

- sets up automatically a primary key on this table (based on shared columns)

- copies unique data into this new table

- removes the necessary columns from the original table

- sets up the foreign keys as specified by the "future relationship"

- rewrites all your stored procedures, views, etc to reference a joined version of these

two new tables (if both of them are needed) or only the relevant table.

More about this at http://www.simple-talk.com/sql/sql-tools/faster-database-development-with-sql-refactor/

Regards,

Andras