Thanks to Mr pareshj for collecting all the links
Useful Links


MOSS Video Demos (Total 14 Modules)
Before You Begin with SharePoint Server 2007
MOSS Tools for performance and capacity planning
Downloadable book: Planning and architecture for Office SharePoint Server 2007
MOSS 2007 - Planning and Architecture for Office SharePoint Server 2007
MOSS 2007 - Administrator Guide
Complete reference of all STSADM operations
Using the 2007 Microsoft Office system for disaster planning and response
Planning and Designing SharePoint Products and Technology Solutions for Geographically Dispersed Sites
Complete reference of all STSADM operations
Complete reference of all PSCONFIG operations

Best Practices

Before You Begin with SharePoint Server 2007
Best Practices Analyzer for WSS 3.0 and MOSS2007
Writing SQL Syntax Queries for Relevant Results in MOSS2007
Backing Up and Restoring Web Sites with Stsadm
Downloadable book: Planning and architecture for Office SharePoint Server 2007
MOSS Hardware and Software Requirements
SharePoint 2007 products comparison download
Which SharePoint technology is right for you?
White Paper: Working with large lists in Office SharePoint Server 2007
MOSS Tools for performance and capacity planning

How to Deploy updates for SharePoint 2007

Deploy software updates for Windows SharePoint Services 3.0
Deploy software updates for Office SharePoint Server 2007
How to troubleshoot common errors that occur when you run the SharePoint Products and Technologies Configuration Wizard

How to configure Alternate Access Mappings (AAM) successfully
http://sharepoint.microsoft.com/blogs/fromthefield/Lists/Posts/Post.aspx?ID=8

What every SharePoint administrator needs to know about Alternate Access Mappings

http://blogs.msdn.com/sharepoint/archive/2007/03/06/what-every-sharepoint-administrator-needs-to-know-about-alternate-access-mappings-part-1.aspx
http://blogs.msdn.com/sharepoint/archive/2007/03/19/what-every-sharepoint-administrator-needs-to-know-about-alternate-access-mappings-part-2-of-3.aspx
http://blogs.msdn.com/sharepoint/archive/2007/04/18/what-every-sharepoint-administrator-needs-to-know-about-alternate-access-mappings-part-3-of-3.aspx

STSADM COMMANDS

Jose Barreto's Blog Complete reference of all STSADM operations (with parameters) in MOSS 2007 SP1
Jose Barreto's Blog Complete reference of all STSADM operations (with parameters) in MOSS 2007

SharePoint Administration Toolkit
SharePoint Administration Toolkit (Office SharePoint Server)

TCP Chimney should be disabled

http://support.microsoft.com/kb/942861
The Microsoft Windows Server 2003 Scalable Networking Pack release