Check out some new TM1 and CDM best practices on IBM Supportlink:
https://www-304.ibm.com/connections/blogs/basupportlink/entry/new_documents_of_interest_for_ibm_cognos_tm1_and_fpm_users?lang=en_us
Blog of IBM Cognos TM1, Cognos BI, Cognos Express, CDM and other related stuff.