Various KB articles that I have found useful or have been recommended to me:
Virtual Machines/Guest OS
Verifying ESX virtual machine file integrity
Tips for Editing a .vmx File
Troubleshooting a virtual machine that has stopped responding
Verifying the health of an operating system
Investigating operating system memory usage
Investigating operating system CPU usage>/a>
Investigating operating system disk space
Powering off a virtual machine hosted on ESX host from the command line
Choosing a network adapter for your virtual machine
Enabling enhanced vmxnet adapters for Microsoft Windows Server 2003
Modifying the Hardware Abstraction Layer (HAL) for a Windows virtual machine
HAL options after Windows XP or Windows Server 2003 Setup
Extending disk partitions in Windows with Diskpart
A Description of the Diskpart command-line utility
Device Manager does not display devices that are not connected to the Windows XP-based computer
Virus scanning recommendations for computers that are running Windows Server 2008, Windows Server 2003, Windows 2000, Windows XP, or Windows Vista
How to configure system failure and recovery options in Windows
PerfMon: High Number of Pages/Sec Not Necessarily Low Memory
An updated version of the Disk Partition tool for Windows Server 2003 is available
How to use the Sysprep tool to automate successful deployment of Windows XP
Troubleshooting timekeeping issues in Linux guest operating systems
Changing Linux run levels
Installing Guest Operating Systems from ISO Images
Extending a logical volume in a virtual machine running Red Hat
Virtual machine does not boot after being converted from a physical RedHat machine
Creating a new virtual disk for an existing Linux virtual machine
Changing the MAC Address of a Virtual Machine
Virtual machine IP Address and DNS Name not available on virtual machine Summary tab
ESX Host
Determining if Intel Virtualization Technology or AMD Virtualization is enabled in the BIOS without rebooting
Verify the health of ESX Server Operating System
Configuring Active Directory authentication for ESX
Determining Detailed Build Number Information for VMware ESX Server 3.5 and ESX Server 3.0.x Hosts
Changing the name of an ESX host
Identifying issues with and setting up name resolution on ESX Server
Checking for resource starvation of the ESX Server service console
Installing NaviAgent on ESX 3.x and 3.5x
Cannot log into the ESX host service console after setting up Microsoft Active Directory authentication
Investigating disk space on an ESX host
vCenter (VirtualCenter)
Troubleshooting the database data source used by VirtualCenter Server
Administrative Credentials Are Required for Oracle and SQL Server Databases When Installing or Upgrading VirtualCenter
Enabling Windows Single Sign-on support in VirtualCenter 2.5 Update 2
Default vCenter Server certificates prevent some client applications from connecting to vSphere 4.0 systems
Replacing vCenter Server Certificates
Sysprep file locations and versions
Migrating VirtualCenter to a different Server
ESX Server host settings required for environments with up to 80 virtual machines per host in an HA Cluster
vCenter Required Ports
VMware HA
Advanced Configuration options for VMware High Availability
Mapping VMware High Availability Heartbeats and Communication Paths
Implications of enabling or disabling VMware HA strict admission control when using DRS and VMware DPM
Storage
Configuring and troubleshooting basic Software iSCSI setup
iSCSI and Jumbo Frames Configuration on ESX 3.5
Investigating disk space on an ESX host
Installing NaviAgent on ESX 3.x and 3.5x
Verifying sufficient free disk space for an ESX virtual machine
Networking
Operating system networking references and tutorials
Identifying issues with and setting up name resolution on ESX Server
ESX Server host requirements for link aggregation
Adding a static route to ESX host for extra service console
Sample configuration of EtherChannel / Link aggregation with ESX 3.x and Cisco /HP switches.
NIC teaming in ESX Server
VLAN Configuration on Virtual Switch, Physical Switch, and Virtual Machines – ESX 3.x
Network performance issues
Operating system networking references and tutorials
Configuring the Cisco Discovery Protocol (CDP) with ESX Server
Cisco Discovery Protocol (CDP) network information via command line and VirtualCenter on an ESX host
How to configure networking from the Service Console command line
Capturing virtual switch traffic with tcpdump and other utilities
Troubleshooting network issues by capturing and sniffing network traffic via tcpdump
Dedicating specific NICs to portgroups while maintaining NIC teaming and failover for the vSwitch
TCP and UDP Ports for vCenter Server, ESX hosts, and other network components management access
Which ports are required for vShield Zones operation?
vCenter Converter
Enabling the Use of Non-root User for Hot Cloning of Linux Source Machines
Best practices for using and troubleshooting VMware Converter
Virtualizing existing domain controllers
Applications and drivers that may not convert into virtual machines
Virtual machine does not boot after being converted from a physical RedHat machine
Troubleshooting the boot failure of a Linux virtual machine converted from a physical computer
Connection to a Linux source fails despite correct SSH configuration
VMware Update Manager
VMware Update Manager Network Port Requirements
Product Compatibility Between VMware Stage Manager and VMware Update Manager
VMware View
VMware View Client requires HTTP 1.1 to be enabled in Internet Explorer
VMware Stage Manager
Product Compatibility Between VMware Stage Manager and VMware Lifecycle Manager
Product Compatibility Between VMware Stage Manager and VMware Consolidated Backup
Product Compatibility Between VMware Stage Manager and VMware Lab Manager
Limit of Eight (8) Managed Servers (Hosts) Per LUN
Is full SQL Server or other external database supported?
VMware Lab Manager
Changing the IP Address of the Lab Manager Server After Moving the Lab Manager Installation
Changing the IP Address of a Managed Server System in a Lab Manager Environment
Backing Up and Restoring Lab Manager
