In one of his estimable books, the title of which escapes me as I have just finished too quickly the delightful onion at the bottom of a gin gibson: "Stand not upon the order of your going, but go at once!"
I've remembered, that's from The Liar.
Anyway, go at once to the nearest bookstore and read the first 10 1/2 pages of Howard Jacobson's The Finkler Question. If you do not then walk out with the book— paid for, one hopes— you are questionable indeed.
That, folks, is how you do it.