SQL Server Integration Services SSIS Design Best Practices

I am optimizing the SSIS packages in my current project. So I need to refer many articles about SSIS best practices to have full information for this.

This is really a chance to improve my SSIS knowledge. I found a series of articles about this in mssqltips, it is usefull, some of them are new to me, and some of them I have experience in my real project.

http://www.mssqltips.com/sqlservertip/1893/sql-server-integration-services-ssis-design-best-practices/