One very obvious indication that you are now in Thai Town is the big Thailand Plaza sign, which is situated in front of the Silom Supermarket, where you could also find a Thai Cuisine and a book store named Dokya.
Silom Supermarket offers many Thai and Asian dry and frozen food as well as fresh produce. You could also find many Thai fruits that are in season like Durian and Mango. I usually stop by for grocery items such as oyster sauce or sweet and sour sauce for eating with chicken. They also offer many delicious deserts (kanom) from various local merchants.
In addition to books and magazines, you could also find many Thai music and movies at Dokya for a premium fee. You could also subscribe to receive Thai magazines in the mail through Dokya, which is very convenient.
There is also a small shop right in front of the Silom Supermarket that offers some information for subscribing to dooTV (www.dootv.tv), which is an entertainment on-demand service that allows you to stream Thai movies, lakorn, music videos, game shows, and other Asian movies and drama series from Korea, Japan, and China. The dooTV service is very similar to Netflix. If you are interested in subscribing, be sure to have a good internet connection that is fast enough for streaming videos.
You could also find many fresh Thai produces such as the Holy Basil for cooking your favorite Thai stir fry dishes. The supermarket also offers a variety of paste for cooking your favorite curries and tom yum soups.
The Silom Supermarket offers a variety of Thai dry and can foods. You could find anything from mama noodles to the delicious Rambutan in cans.
Also in front of the Thailand Plaza is the Brahma Buddha statue. Remember to pay your respect to the Buddha as you walk pass to the New Hollywood Plaza, which houses a variety of Thai shops and restaurants.
You can find many delicious Thai deserts and sweets at Ganda (http://www.yelp.com/biz/ganda-siamese-cuisine-los-angeles). The restaurant is only one of the very few that claims to offer delicious sukyaki that is comparable to what the MK Restaurants offer in Thailand.
Ganda is the perfect place for those who do not like to wait too long for the food. The restaurant offers pre-cooked foods that you can and choose from. If you can't find it on the display, there are also a variety of items that you can choose from the menu.
Ban Kanom Thai is my favorite place for finding delicious Thai deserts. Although you could find many items that are pre made and ready to eat, the place offers a few special fresh, hot items on the weekends. Just remember to stop by in the morning before they run out.
You could find fried deserts or ice cold deserts like shave ice with delicious toppings or a bobba. My favorite is the shave ice with red mung beans and grass jelly.
I also like to stop by the place for some chines donuts, which goes very well with hot soy bean drink.
My other favorite item is the Tao Kae Noi seaweed snacks. The place offers Tao Kae Noi snacks in a variety of flavors, but my favorite will always be the original fried seaweed.
The North Hollywood Plaza is one of the few places that I visit on a weekly basis. Whether if its authentic Thai dishes or groceries, this plaza is definitely a one stop shop for your those who misses Thailand.