Succulents are awesome. I don't have the best luck with keeping indoor plants healthy (or alive), but succulents seem to always have my back. They're hardy, they don't mind if you forget to water them for a few days, and they don't require a ton of maintenance. Plus they are just adorable. Additionally, they are also easy to fill your home with for almost no extra cost. All it takes is a little propagation; as in, you can regrow succulents from existing leaves (magic, right?).