#(left)

Make an L shape with both hands, left is in the correct reading direction

Another hand shape or gesture

A mnemonic (e.g. "right's the one you write with, left's the one that's left")

Imagine myself in a specific place or orientation

Imagine myself doing a specific activity

Another way

I don't need a special trick, I just know which one is which

I don't have a special trick, I simply DON'T know which one is which