This is a short but powerful post. Here is a list of must-have resources for anyone using the HRMS / HCM Suite in Oracle Applications E-Business Suite:
Oracle HRMS Forum: This is the official Oracle hosted forums, moderated by real live Oracle employees. This leans more towards the technical side of the applications, but I have generally received quick answers from participants. http://forums.oracle.com/forums/forum.jspa?forumID=113
OHUG – Oracle HCM Users Group: If you are using Oracle HCM products, including PeopleSoft and now Taleo, you must join. They are an independent users group focused exclusively on Oracle HCM products. They are very influential with Oracle on the development of new features and products and their conference archives are full of excellent presentations. http://ohug.org
My Oracle Support: My Oracle Support (MOS) should be obvious, but I am surprised at how many of the HR, Benefits, and Payroll people do not have access to MOS (formerly Metalink). This is full of information on your products and the search feature is very powerful. I know there are people who really dislike it, but it keeps improving year after year, and the best improvement lately has been the migration away from Adobe Flash.
Ask your application manager or director for access, particularly if you are in a super user capacity. Your organization pays a lot of money for this resource, so you should take advantage of it. https://support.oracle.com
Oracle E-Business Suite Technology Blog: If you have ever performed an Internet search for Oracle EBS information, you probably have been here. This official blog, by Steven Chan of Oracle, focuses on the entire EBS development, but there is a lot of value for HCM users. It is well written, accurate, and useful. https://blogs.oracle.com/stevenChan/
PeopleApps: A collection of forums for various ERP applications, although the forums are mostly dead. This is home to the archives of the long-running OraHRMS-L list-serve, in which I used to participate. Although there are no recent updates, it is still an excellent resource for troubleshooting issues if you are still on Oracle EBS 11i. http://peopleapps.com
If you have any you would like to share, please add a comment!