The best ways to be able to look at your scripts some weeks/months/years after writing it is to script properly.

Here below is the format at always use, I use it as a script template :

<#
	.SYNOPSIS
		Write a little Synopsis about the script purpose

	.DESCRIPTION
        AUTHOR : Chris ROUALIN - powershelltips.fr
		Write a little description about the script purpose

	.PARAMETER  Subject
		Using -Subject parameter for the script.

	.PARAMETER  Message
		Using -Body parameter for the script.

	.EXAMPLE
		PS C:\>.\Script-Template.ps1 -Subject "Powershell" -Message "Show how to use Powershell script template"

	.NOTES
        This is just an example of a notes displayed in help

	.LINK
		https://powershelltips.fr
#>

This part make your script reachable with the Get-Help command :

Then, use some comments to create “section” in your script, such as :

##### VARIABLES


##### FUNCTION


##### PREREQUISITES


##### MAIN

So your powershell script will be easy to read/modify, adapt if the script is moved or if any variable has to be modified…

Also, never forget to comment as much as you can your script ! Every “block” need a comment to make it readable quickly !

Remember also that aliases are not welcome in a script, because not everyone knows what “%” means for example !

Cheers !