If your water bowl is empty or you feel like spoiling yourself the ceramic chair next to the laundry or in the bathroom is actually a private spring. It may be a challenge to reach into for some but the aroma and taste is worth the effort. Finally, if all other attempts at getting what you want have failed grovel shamelessly. And if that fails allow long gelatinous drools to run like rivers from your bottom lip while you stare intently at the object. You should win by default when you have managed to turn the human's stomach.
Most facial expressions are a waste of time.
Overwhelming joy, and morose self-pity with ribbons of saliva dripping onto a recently cleaned floor are extremely effective. Otherwise don't bother. If it is not mealtime assume it is nap time, especially if your name is being called repeatedly. The most relaxing position is on your side with all four legs parallel, and the best place is dead centre of any street or driveway. If abject depravity has been inflicted on you in the form of a bath the quickest and most practical way to get dry is shake violently near the person responsible.