When making tuna salad don’t scoop the mayonnaise in spoonfuls into the tuna and just guess how much needs to go in. Scoop in a spoonful, stir, see if it’s enough then scoop in another spoonful, stir, check if it’s enough and if it’s not enough repeat what I instructed until there’s enough mayonnaise.
I made the mistake last night just scooping many spoonfuls of mayonnaise into the tuna. Tooooo much, mayo. Now, I have to go buy more tuna to balance the mixture. (sigh)