Here you can find my own short VMware PowerCLI course. It consists of several small articles which will let you (me aswell :)) to organize the general knowledge about PowerCLI.

1. VMware PowerCLI – Introduction
2. Useful Tools
3. Basic commands to generate and export reports
4. Monitoring VMs with PowerCLI
5. Managing VMs using PowerCLI
6. Managing multiple VMs based on their tags
7. Monitoring ESXi hosts with PowerCLI
8. Managing ESXi hosts using PowerCLI
9. Managing virtual networks using PowerCLI
10. Managing Cluster-wide settings using PowerCLI
11. Complete ESXi configuration with a single script