Good Cheer

As a rule of thumb I think we'd all agree to treat anything entitled How To Be Happy with radical scepticism, especially if you need to pay for the advice therein. But there's an exception to every rule and in this case the invariable wisdom of the First Dog in the Moon triumphantly proves such. The best guide (being both cheery and helpful to boot) I've ever read on the subject, essentially telling us all we need to know.