While looking for a left-handed bread knife, I ran across this page which is the most complete lists of left-handed unfriendly objects I've seen.

Reading down it, I'm suprised how many of these I've adapted to. I turn a can opener with my right hand, pour saucepans using my right hand, scythe with my right hand leading, use a tape measure as a right-hander would, and hold playing cards in my right hand. OTOH, I hate using scissors, I almost never hand-write anything, and I never could get a boomerang to work.