If you're looking for something a little different in a sandwich shop, the Boulder Creek Market is a good place for it-- they have different things like ostrich sandwiches. They usually have some good soups and such, too. There's not a whole lot of parking in this area, but it is very close to the bus lines and not too far from some of the downtown parking structures.
Village Video is a great locally-owned video place in North Boulder. Parking can be a little tight, but other than that, the location is great. The staff is friendly and knowledgeable. While they don't have as many copies of videos as some of the chain places, they have a pretty good selection. I don't know if they're still running it, but they used to have a deal where if you saved up a certain value in receipts you got a free rental.
I think the North Boulder Cafe is a great place to go for breakfast or lunch when you're looking for a hearty meal but don't want to venture too far into downtown Boulder. The meals are a good value. I also just think it's cool that this restaurant shares space with a Thai restaurant (North Boulder Cafe for breakfast and lunch, Bangkok Cuisine for dinner).
While they have a small area with tables for eating in, my family almost always gets take-out here due to its convenient location in north Boulder. The food is a good value, and they have quite a selection of fairly typical Chinese restaurant items.
The Boulder Army Store has a pretty decent collection of outdoor gear-- clothing, footwear, tents, etc. I think some of the prices can be a touch high, but they sometimes have good sales. I found the staff to be helpful, although at times it can be a little crowded at the store, making it a bit more difficult to get help.
I really like to shop for running shoes at Boulder Running Company. Their friendly staff is always ready to help you find a shoe that works for your needs, and they check out your running form on the treadmill and let you try out the shoes outside on the sidewalk and/or the parking lot. What I really like is that you get the same great service including the treadmill assessment even if you're just picking up a pair of shoes from the sale display and want to see if they'll work out-- the staff don't force you to get the latest model.
The store also has a good selection of socks and other apparel. The give discounts, too, to members of high school and college teams.
I have had several dentists tell me that the orthodontic work that I had at Boulder Orthodontics by Dr. Lang is of very good quality-- they look in my mouth and say, "Who was your orthodontist? He did very nice work!" I had braces for two years while I was in college and had all the work done at this office. The staff is always friendly, and they are flexible with scheduling to meet the needs of busy people. I would trust Dr. Lang and his team with any kind of orthodontic procedure.
I had a retainer made at Dr. Walker's office many years ago. I thought Dr. Walker and his staff were friendly and efficient. I have no complaints about the work I had done to my teeth.
I remember when I was younger going with my parents to the North Boulder Liquor Store and getting a free lollipop, so there's something here even for the underage. This family-owned business has friendly service, and it is not too crowded and has plenty of parking. The selection of mid-priced beers isn't too great, but they have a decent selection of wines and other liquor.
I really like Dr. Richard a lot. My mom and I started going to him after a not-so-good experience with another doctor. Dr. Richard always makes me feel like he's glad to see me, even if it's just for a routine physical. He kindly suffered through all my Peace Corps medical clearance paperwork, and he's been a lifesaver (literally) in treating my mom's Lyme disease.