What destination you are using?

I recommend using OLEDB destination with fast load.

This will use Bulk Insert which eventually improve performance.

SQLCAT team published really nice paper about SSIS best practises .Worth reading

http://sqlcat.com/sqlcat/b/top10lists/archive/2008/10/01/top-10-sql-server-integration-services-best-practices.aspx

Hope it helps!

P