1. Add some green into your house
Adding some plants at home is not only eye relaxing but it also helps to make the house look presentable. If you're up for something that doesn't need a lot of time tending to, a plant like cacti or even aloe vera will do.
2. A few books will help make your house (and you) look smarter
You can have a few hanging shelves around or just have some books lay neatly. On whichever space is avail, you can add some books or magazine there so it doesn't make your house look empty.
3. Wall art that amplifies your personality.
You can add in some wall art or change your house wallpaper to fit your personality so when you present your house to your guest, they will know more or less how your personality is.