I never knew until now that if you put leftover salad leaves in a bowl of water they keep all fresh and crispy and you can eat them a couple of days later. Of course you have to drain them off and shake them well to get the water off but I'd despaired of what to do with left over salad. I take out the tomatoes and peppers and throw them in a spaghetti anglaise but the leaves, until now, have had to go on the compost heap. And, since we're eating salad faster than we're growing it at the moment, it's saved me a quid too.