Create Custom Job

Create Custom Job:
http://dotnetfinder.wordpress.com/2010/07/24/creatingcustomsharepointtimerjob2010/
http://platinumdogs.wordpress.com/2010/05/05/sharepoint-developing-custom-timer-jobs/
http://msdn.microsoft.com/en-us/library/cc406686(v=office.12).aspx