Once the rice has cooled down a bit, start assembling your other ingredients and tools. Rice, crab flakes, seaweed wraps, cucumber, avocado, omelet, and a cup of water. Spread the rice on the seaweed. Leave a small part of the seaweed with no rice. Layer the crabs, omelet, cream cheese, and cucumber. You can substitute crab flakes with crab stick. Roll the sushi nice and tight. Use your finger to gently apply water on that part of the seaweed with no rice. The water will seal the roll together.