I've gotten into a DIY cleaner kick lately. I'm by no means a crunchy, anti-shopping person (I'm actually the exact opposite of that person), but there's something to be said for knowing exactly what you're working with, and knowing that you can always have it on hand. My stain remover is my absolute favorite, and now I'm branching out.
Recently I started making my own washer fluid for the car. This stuff is available everywhere, and it's cheap. But like most things that are available everywhere, I always walk right by it and forget that I'll need it. Then I'm out at the most inconvenient time. But once I found this DIY method, I know that I'll always have the ability to have it on hand, and it works really well!