Not helpful, but maybe amusing?:

I have often considered getting a small raspberry on my right hand just below the thumb, and a lemon in the same place on my left- to help me with left and right (I have problems with that).

I recently upgraded to considering bigger tattoos on the backs of my hands with the formula for the Area of a sphere on my right and the Volume of a sphere on my left- because Area has "r" in it, and an A looks kinda like an R, and Volume has an "l" in it and a V looks kinda like an L.

I don't know why I have so much easier of a time recognizing the formulas for Area vs Volume of a sphere than I do left vs right...