[just_steve_h]

I have a shell alias so I can just type pb to do pbpaste|pbcopy - easiest way I’ve found to strip formatting and get plain text.

[wtallis]

It's a little awkward, but Cmd-Opt-Shift-V is "Paste and Match Style" aka "paste as plain text".

[blairbeckwith]

Pro-tip (at least for me): control (^) doesn't change this, so you can just hold all the modifier keys rather than trying to remember which 3 let you paste as plain text.