I used to collect instances of things that I called "accidentally right-handed".

the designs of mugs - the patterns almost always assume that you are right handed.

Cake forks tend to have a blade down one side - guess which.

Packs of cards. Fan them out with your left hand and you can't see the mark in the corner telling you what they are.

Measuring cups - if you use them with the left hand, the marks face away from you.

Cameras - The shutter release is always in the right.

Rulers and tape measures

bicycles

tv and stereo remote controls, the most frequently-used buttons are placed under the end of the thumb of a right-hander holding the remote.

bus fareboxes are on the right as you board the bus (in the US), an awkward reach across your body if you have the fare in your left hand.

student desks

musical instruments including

    guitars
    the violin family
    the brass instruments
    flute 

crank-operated pencil sharpeners

ATMs & vending machines

oven mitts with heat-resistant material on one side only - the side that faces the hot item only if you wear the mitt on your right hand