Lemons for me is very often people cutting me off in traffic. Usually that happens (or catches me unawares) when I aren't paying attention. So when I get those kinds of lemons it reminds me to start paying more attention to where I'm going. Look around, be present, see what people are going to do before they do it. Usually, once I start paying attention, even when people cut me off I see it early enough that I can just steer around them, or I find that it just doesn't bother me.