Prepare 2 cups white sushi rice (also called glutenous rice or sticky rice) according to directions. When it's finished, mix together 3 tablespoons rice wine vinegar, 2 tablespoons sugar and 2 teaspoons salt, then mix this into the rice. Let the rice sit for a while to let the vinegar smell dissipate some.
Then mix into the rice toasted sesame seeds and crumbled up nori sheets, then add anything else you want in your sushi, such as sliced avocado, carrot and/or cucumber, tofu, fish (raw or cooked), roe, krab, shrimp, beef or chicken.
You can just mix everything together, or for presentation, artfully arrange the ingredients on top of the rice. Serve with soy sauce, wasabi (optional) and gari (pickled ginger, optional)