Reading, typing, writing. Whenever we need to write an essay, my friends are going crazy over it. I just figure a good start and let the text flow from there. And I get pretty good grades from them as well. I'm quick to learn new words from different languages, too.
I can usually work out stuff in my head quicker than the time it takes my husband to key it into the calculator. He still does it of course. You'd think that after 18 years he'd have learned to trust my reasoning in such things.
10 key calculator. I can tally an endless column of numbers faster than anybody I know. People at work get a kick out of the machine gun like clicking as I add. Spreadsheets are making this talent obsolete though.