Learn how to properly cook the rice!
When I was a boy my father fancied himself as pretty good at making asian cuisine (actually, he had been taught by people who really knew their stuff, so he was pretty good.)
I remember him making the rice for the sushi, and as he poured and mixed in the flavour mixture (the recipe for which I can no longer remember) into the rice, he had me fan it like crazy to cool it quickly. Apparently this gave it a nice "glaze".
Seems like a lot of trouble to go to for home sushi, but that was him.
I recall an interview with Masaharu Morimoto (Iron Chef) where he talked about apprentice sushi chefs being only allowed to make the rice for some crazy amount of time before being allowed to do anything else. Practice makes perfect. I'm sure my rice is far from even ok for the professionals but it is still fun and ok for my use.