If you find yourself in the area with some spare change, head to Harajuku Gyoza Lou for some of the best (and cheapest) gyoza in town. Service is fuss-free and easy, with just two decisions required: chives and garlic or original, and whether you want them pan fried or steamed. Each serving will set you back a mere ¥290, so there’s no reason not to go. To avoid the long lines, try to get there before 6pm on weekdays, though.
6-2-4 Jingumae, Shibuya-ku. Nearest station: Meiji-Jingumae.