Prepare a bowl of cold water to dip your hands in to keep them wet when you handle the rice. This will help from rice sticking to your hands.
Place sushi mat in a large ziplock bag to prevent the rice sticking to the mat. Arrange everything (rice, fillings, etc) around the work area.
Place a seaweed sheet rough side up on the prepared sushi mat.
With wet hands, take about 1/2 cup of sushi rice and spread it evenly over the nori sheet, leaving about 1/2 inch space from the top. Again, don’t mash the rice too much. You want the rice stay fluffy and light.
Arrange the fillings in whatever combination you like. (For example, just cucumber, or just avocado, or cucumner + shrimp, or cucumber + smoked salmon, etc.)
Then place your thumbs under the mat and bring the roll over the fillings. Use your other fingers to hold the fillings in place and continue rolling until it reaches the end of the nori. Make sure the seam is on the bottom. Gently squeeze along the bottom of the roll and don’t press too hard. Just gentle but firm squeeze to give it a good shape.
To make inside out rolls, spread the rice evenly on seaweed sheet, sprinkle some toasted sesame seeds and flip everything over. Now arrange the fillings straight on the nori sheet. And roll just like the previous roll. Again try not to press too hard, just gently run your fingers along the bottom and top to shape the roll.
To cut the rolls, use a sharp knife and wet it lightly for a clean cut. Run the knife in gentle sawing motion without pressing too hard and smushing the rolls. Wipe the knife on a clean wet towel in between cuts to prevent the rice from sticking to the knife.
Arrange the cut sushi rolls on a serving platter. Serve with soy sauce and wasabi for dipping.