I fear I have been disingenuous in the titling of this blog post and must now come clean... The trick is a lie. Do not under any circumstances believe anyone who tells you they have one very easy method of doing something fantastically complex because the only weird trick they are pulling is one in which person A is duped by person B and person A probably deserves it.

However you can avoid this by using my one weird technique to avoid being suckered by shysters selling snake-oil…