Here’s a useful bit of line noise that I came up with when I wanted to put some quoted text into email.  Starting with unwrapped text in the clipboard:

Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

It generates:

[D:\Temp]
PS:30 > Get-Clipboard | %{[Regex]::Split($_,'(.{0,60}(?:\s|$))')}|%{if($_){"> $_"}}

> Lorem ipsum dolor sit amet, consectetur adipisicing elit,
> sed do eiusmod tempor incididunt ut labore et dolore magna
> aliqua. Ut enim ad minim veniam, quis nostrud exercitation
> ullamco laboris nisi ut aliquip ex ea commodo consequat.
> Duis aute irure dolor in reprehenderit in voluptate velit
> esse cillum dolore eu fugiat nulla pariatur. Excepteur sint
> occaecat cupidatat non proident, sunt in culpa qui officia
> deserunt mollit anim id est laborum.

Edit: Here’s a version that’s 16 characters shorter using V2’s -split operator!

(gcb)-split'(.{0,60}(?:\s|$))'|?{$_}|%{"> $_"}

Have any densely useful snippets you’d like to share?