Is there a way to clear all your chosen perks and get them back unused? Command, cheat whatever.

I was actually hoping the Oghma Infinium would be a character's one shot at resetting stat points. There should be at least one way to save a character from a misallocation that may have occurred through ignorance. I'm loving my assassin, but I wish I could fix a few of the perks I've allocated.

I haven't heard of any commands to reset perks, and as far as I know there's no way to give yourself unassigned perks. If you have the time though, you can remove all of your perks, then manually place them where you want using the following commands.

player.removeperk player.addperk 

and to find the perk ids

help "perk name" 4