You should simply copy and paste the following block comment right above your functions and magically Get-Help works with your functions, too!
<#
.SYNOPSIS
A brief description of the function.
.DESCRIPTION
A detailed description of the function.
.PARAMETER something
The description of the first parameter.
.EXAMPLE
PS C:> My-Test -something 'string value'
.NOTES
Additional information about the function goes here.
.LINK
about_functions_advanced
#>
Function My-Test($something) { 'Call Get-Help My-Test to see my help!' }
.SYNOPSIS
A brief description of the function.
.DESCRIPTION
A detailed description of the function.
.PARAMETER something
The description of the first parameter.
.EXAMPLE
PS C:> My-Test -something 'string value'
.NOTES
Additional information about the function goes here.
.LINK
about_functions_advanced
#>
Function My-Test($something) { 'Call Get-Help My-Test to see my help!' }
So to get Help, after running the code, you should try this:
Get-Help My-Test
Get-Help My-Test -examples
Get-Help My-Test -examples
You won't get help with PowerShell v1, and you won't get Help if the Help block is wrongly located. It can be right above a function (no more than one blank line), or first/last thing inside the function.