http://blogs.msdn.com/jjameson/archive/2010/03/20/error-handling-in-moss-2007-applications.aspx

http://www.andrewconnell.com/blog/archive/2007/02/01/5935.aspx
http://paulgalvin.spaces.live.com/blog/cns!1CC1EDB3DAA9B8AA!154.entry
http://support.microsoft.com/kb/914212
http://vspug.com/michael/2007/06/28/sharepoint-under-the-hood-see-real-error-description-and-callstack-stack-trace/
http://www.sharepointcomic.com/archive/2009/03/15/sharepoint-error-messages.aspx
http://www.dlocc.com/articles/sharepoint-errors-warnings-and-problems-collection/
http://www.getsharepoint.com/blogs/bw/Lists/Categories/Category.aspx?Name=SharePoint%20Errors%20%2F%20Limitations
http://www.endusersharepoint.com/2010/01/07/sharepoint-errors-warnings-and-problems-collection/
http://msmvps.com/blogs/cgross/archive/2009/03/29/sharepoint-search-amp-event-id-2436-errors-in-sbs-2008.aspx
http://www.moss2007.be/blogs/vandest/archive/2008/02/23/sharepoint-errors-6482-7888-6398-and-7076.aspx
http://blogs.msdn.com/vule/archive/2008/05/22/sharepoint-error-you-can-safely-ignore.aspx
Sharepoint DCOM Error
http://soerennielsen.wordpress.com/2007/04/16/fixing-those-pesky-dcom-event-log-error-10016-in-a-sharepoint-farm-environment/

(via http://jopx.blogspot.com/2010/01/user-activity-statistic-in-sharepoint.html)

https://sharepoint.missouri.edu/wiki/Wiki%20Pages/MOSS%20Usage%20Reports%20explained.aspx

http://blogs.technet.com/corybu/archive/2007/05/31/sharepoint-orphans-explained.aspx

Sharelong losg to look at when troubleshooting

http://raiumair.wordpress.com/2007/06/19/quick-a-to-z-of-sharepoint-logs/

Sharepoint schema version

http://blogs.technet.com/wbaer/archive/2007/10/15/kb934525-troubleshooting.aspx
http://cs.grossmann.com/blogs/fg/archive/2007/08/23/sharepoint-hotfix-936867-renders-sharepoint-unuseable.aspx
http://blogs.microsoft.co.il/blogs/adlaim/archive/2007/10/26/the-schema-version-3-0-149-0-of-the-database-sps-content-db-on-moss.aspx

Tracing detailed Sharepoint operations

http://support.microsoft.com/kb/947285/en-us?spid=11373&sid=312

http://blogs.msdn.com/joelo/archive/2008/02/07/verbose-list-of-sharepoint-server-2007-events.aspx

http://blogs.msdn.com/jannemattila/archive/2008/02/04/catching-unhandled-exceptions-in-sharepoint.aspx

http://blogs.msdn.com/feldman/archive/2007/11/18/writing-to-the-sharepoint-trace-log-in-your-code.aspx

Since Sharepoint is getting huge wouldn't it be time to establish a Sharepoint Benchmarking Standard like the one for Exchange(MMB3).

Other sharepoint performance posts:

http://blogs.msdn.com/sharepoint/archive/2006/02/27/539689.aspx
http://blogs.msdn.com/joelo/archive/2006/08/17/end-to-end-performance-digging-into-your-sharepoint-server-and-wss-network-perf-issues.aspx
http://weblogs.asp.net/jan/archive/2006/03/15/440270.aspx
http://www.sharepointblogs.com/ssa/archive/2006/11/28/16434.aspx
http://mindsharpblogs.com/andy/archive/2005/08/25/673.aspx
http://blog.u2u.info/DottextWeb/patrick/archive/2005/08/31/8363.aspx
http://msmvps.com/blogs/shane/archive/2006/11/02/Farm-performance-level_3A00_-PartylReduced.aspx
http://www.ekegren.dk/blog/AddBlogComment.aspx?id=35
http://blog.svoboda.co.nz/2006/11/28/Getting+Performance+Out+Of+Sharepoint+Doc+Lib.aspx
http://www.graphicalwonder.com/?p=607
http://blogs.tamtam.nl/mart/MicrosoftSharePointPortalServer2003PerformanceSummary.aspx
http://mcosier.blogspot.com/2006/03/sharepoint-portal-server-2003.html
http://blogs.imason.com/jim.schwartz/archive/2006/07/19/5695.aspx
http://blogs.msdn.com/martinkearn/archive/2006/03/15/551822.aspx