What tips and tricks have made you a smarter/less wasteful cook?
I was rewatching an episode of Nigella Lawson's old show (as one does) and she mentioned how she freezes egg whites if a recipe calls for yolks, this way she can make meringue/whatever down the line and winds up using the whole egg. I'm sitting there thinking "That's brilliant!" and "How did she think to try that out?". So...
Do you have any tips that have made you a more savvy home cook or baker? I feel like I want a whole cookbook of just little tips and tricks like Nigella's!
(Here's mine: I keep the wrappers from butter sticks and use them to grease cookie sheets).