For those who are just starting down the road of PowerShell to those who have used PowerShell for some time, having a reference sheet (or sheets) could prove useful. As a heavy user of PowerShell, having some sort of reference is always nice to have, even if I only use it every once in a while when I forget a concept, or am looking for specific syntax.
A few years back, PowerShell magazine created a series of these reference sheets for PowerShell 4.0 and WMI/CMI as well as covering PowerShell ISE. Since PowerShell 7.0 was released recently, with no recent updates on theses templates, I started creating a series of these templates for people to use for reference.
At this time I have a PowerShell 7.0, Exchange 2019, Security and Compliance Center and Microsoft Teams PowerShell quick references. These are all free to download so feel free to download them at any time. Also, if you do download it and you like it/hate it, please leave some feedback here so I have an understanding of what is good or bad in them. I will be adding more over the next 6 months, but this is the current set.
Sample Screenshot [PowerShell 7.0 Quick Reference]:

Below are download links as well as direct links to the Quick Reference page on my other blog.
Main Quick Reference page link:
PowerShell Quick Reference Page
Direct Download Links:
PowerShell 7.0 Quick Reference
Exchange 2019 PowerShell Quick Reference
Security and Compliance Center PowerShell Quick Reference
Microsoft Teams PowerShell Quick Reference
Enjoy!