hi

if your talking about resources for dba's then here are some of them which i use frequently

websites

http://www.dbasupport.com (off course no 1 choice :-).....)
http://www.lazydba.com join the mailing list
http://www.vampired.net ( a startup i must admit)
technet.oracle.com
http://www.revealnet.com
http://www.timoninons.com
http://www.oracledba.co.uk
http://www.oracle.com/oramag
technet.oracle.com
http://www.tusc.com

books
orielly books on plsql
oracle 24X7 tips and techniques by venkat devraj
oracle performance tuning tips and tricks by rich mimec
oracle advanced pl/sql programming by urlike schwinn
oracle backup and recovery guide by rama velpuri
oracle annotated archives by kevin looney and rachel carmiceal
oracle dba tips and tricks by sumit sarin


most of my dba skills were honed from these places hope it
will help you too.

regards
hrishy