Hidden Indian spice and grocery store in Thousand Oaks. They carry all sorts of curries and spices, Indian dried and canned food, fresh vegetables, and you can even get samosas and Indian videos from the counter. The only place in the area if you are looking for Indian ingredients or foods. The prices are outstanding as well--curries and spices like cinnamon (both ground and in sticks), cardamom, and more are extremely cheap and available in large quantites. Even better, it's much fresher than the horrible spices you get in most grocery stores.
Professional photo finishing targeted at professional photographers. The Image Source does standard photo processing, but they are one of the few E6 photo labs in the area and can do push processing, choice of slide mounts, black and white, enlargements--you name it. This is the place where professionals and advanced amateurs develop their film, for good reason--these guys really know what they are doing and do an excellent job of developing and printing photos.
Camera repair service center. Tucked away beside auto repair shops in an industrial cluster, but very good service for anyone who owns a camera and needs repair. Honest -- brought in a camera which just needed some cleaning and they spent 20 minutes cleaning out the camera and making sure it was working and didn't even charge me for the time. Factory certified on lots of different brands.
A used book store with lots of high quality, barely used books for a bargain price. Great for finding beach reading or something for that trip--lots of current titles and paperbacks. Not so great for nonfiction or for finding used/classic books, but theproceeds to this book store go to charity (it's run by a charity). Unlike most used book stores it's airy and light, not dusty. Very helpful staff. Hard to find -- off Thousand Oaks boulevard on a side street.
All sorts of Asian food, in a big supermarket. This market, which has a number of branches in the LA area, carries all sorts of Asian groceries, ranging from rice to seasonings to seafood to produce. The only source for very good Asian produce and fruits, and you can even find things like Durian and mochi ice cream here. The seafood and meat counter puts all the US chains to shame.
Lots of cheap cheap cheap Japanese trinkets, from containers to kitchen supplies to toys. Lots of things for not a lot of money, though as you'd expect in a 98 cent store it's a pretty big jumbled mess. Also a smattering of random American brands. An interesting place to stop in to look for cheap plastic kitchen supplies, containers, or for cheap japanese ceramics.
The place for Japanese food and products in Los Angeles. Mass market grocery store which carries almost every Japanese food imaginable, from dry goods and supplies to fresh sashimi. Great place to pick up extremely high quality, fresh sashimi without paying sushi bar prices. Requires a yearly membership, but well worth it if you use lots of Japanese ingredients or food. They also carry appliances like rice cookers, ceramics, and traditional japanese clothing.
Great pet supply store, which carries everything from dog and cat food to rabbit pellets to bales of hay for your horse. A carry over from when the area was a farming community, and often has chickens for sale and more. They charge very reasonable prices and have a much better selection of feed for both pets and livestock than you'll ever find at one of the big chain pet stores. Very few toys and knicknacks -- they specialize in feed for your animal. Highly recommended.
Are you a do it yourselfer, and do you like to fix your own appliances? This is a one-of-a-kind find, where they either stock or can order parts for any kind of home appliance. I've used them for dozens of jobs to fix my home appliances (stoves, refrigerators, etc.), where I avoided having to shell out hundreds of dollars for lousy repairmen who wouldn't know how to fix things. This place seems to be able to find parts for anything.
Great small business that can repair any watch you own. They offer fair prices and have fixed numerous watches for me, and can do battery changes as well as sell timepieces. A specialist in watch repair, which is tough to find in an age of clueless department store watch departments stocked with teenagers. A real craftsman.