Tip – Sometimes you may wish a user to login to a specific area menu or transaction code. This can be easily done by assigning the area menu or transaction code to the user profile. To set the user start menu in CRM to CRM_MENU, assign the start menu to the users profile in SU01.
To see what area menus are available in Standard SAP check the values in SE43. Here are some good area menus:
VC00 Sales Support
VS00 Sales Master Data