What do you do when you have a terrible idea for a world?

I know this post isn't for me alone - I see it in the comments here all the time. Every other post, there will be a "This is a terrible idea, but..." comment, apologizing for an idea that really isn't that bad. I know that I personally look at some of my older ideas and want to crawl under a rock and die because of how cringy they are. In an ideal world, we would all have brilliant ideas all the time, but this is the real world, not an ideal one, so that's just not going to happen.<br><br>So, you have a terrible idea for a world. What do you do with it? I'm not talking about an idea that's offensive or anything, but rather just... not good. The first thought you probably have is to toss it. Throw it out and move on with your life. If the idea is truly terrible and you can't salvage anything from it, that's probably for the best. But what if you can salvage something? Maybe there's a single detail from that idea that you really like. Maybe there's a plot thread or two that you think could work in a different context. Maybe you even see a way you can make the idea itself work, just with a lot of additions, subtractions, and modifications.<br><br>At what point does an idea go from your baby to a millstone around your neck? The obvious answer is "Whenever you decide it has." But how do you make that decision? And if you do decide to toss an idea, what, if anything, do you do with it then? Do you toss it completely, or do you save it to look back on later and remind yourself of how far you've come? Do you intentionally forget about it and move on with your life?<br><br>I have managed to salvage one of my old worlds by completely flipping the subgenre on its head (it was supposed to be high fantasy, it is now Solarpunk, in which practically all of the solar system is colonized and is filled with alien species) as well as cutting out the three books that took place on Earth and instead starting in the space colonies.<br><br>So all in all, what do you do when you have a bad or unworkable idea for a world?