If you’ve never tried Pho before then you are missing out. It is a very enjoyable experience. There isn’t much etiquette involved but there are ways to maximize your enjoyment…
Choosing, and Setting Up Your Pho
When you open your menu, it might look a little overwhelming with all the variations of Pho to choose from. The variety is simply personal preference. When in doubt, go for simple ‘Rare Beef Noodle Soup’! Don’t worry the beef is sliced so thinly that it cooks almost immediately after being immersed in the hot soup. After you make your order a plate of bean sprouts, Thai basil, lime and chillies will arrive at your table. These are options to sprinkle and squeeze over your main bowl till it suits your taste.

been sprouts, basil leaves, lime
Here is a list of some common combinations found on most menus:
Phở Đặc Biệt
Special Pho Noodle
Phở Tái
Rare Beef
Phở Tái Sách
Rare Beef and Tripe
Phở Tái Gân
Rare Beef and Tendon
Phở Tái Nạm
Rare Beef and Flank Brisket
Phở Tái Bò Viên
Rare Beef and Beef Balls
Phở Gà
Chicken Pho Noodle
Finally, an aromatic and steaming bowl of noodle soup is placed before you and if you are wondering where to begin then let your senses be your guide. What I always do is to try the soup first. Depending on how flavourful it already is, I add condiments accordingly. I usually immerse most of my bean sprouts and make sure they make their way under the noodles so they cook slightly. Tearing some basil leaves off the stem and sprinkling them over the noodles along with a squeeze of lime will probably give your tastebuds a lift from the deep flavour of the beef bone soup. Then you can experiment with the balance of the caramelized sweetness of hoisin sauce and the amount of heat from Sriracha hot sauce and/or chillies you like.
Spooning It Correctly
Now you are ready to eat but there is a highly efficient method that closely resembles the spoon and fork action when consuming spaghetti, except with chopsticks. Eating noodles in soup can be a slippery affair which could result in a less than satisfying mouthful that ends up back in the bowl. The solution is a two handed technique. Chopsticks have the agility and sensitivity to lift and select individual bitefuls while the Asian soup spoon is broad with a beveled edge which allows for more than just soup. To get all the flavor and texture of your precisely customized and balanced bowl of noodle soup into each mouthful is by always assembling the perfect pile of noodle to beef to soup ratio onto your spoon. This is done by using your chopsticks to nimbly arrange noodles, a slice of beef and depending what you feel like for that particular bite: basil, chilli or sprouts to top, onto your spoon. Then lower your spoon into the soup and proceed to bring it to an open mouth. Enjoy!

Apologies for the quality. It was difficult to concentrate on the task at hand!

another angle
When you feel more adventurous, do try the other combinations mentioned above. If you don’t eat beef there is sometimes a chicken option and if you don’t eat meat then there are vegetarian versions that come with fried tofu and vegetables. All can be eaten in the same manner. Have fun!

I don’t usually have time to go through all that. just chopsticks to mouth. repeat.
Whatever floats your boat!
Very interesting, never tried Pho.
This site will give me a heads up when I do try it.
Phew! So I’ve been eating pho properly all these years.
A dear friend taught me the two utensil method (chopstick and soup spoon) when we were in school. I still can’t get my spoonfuls of noodles, broth, and accompaniments as neat as she does.
Great explanation!
I’m currently exploring the site and enjoying everything I’ve seen so far!