We're sure you've seen some variation of this project before, but it's just so good that we couldn't leave it off this list. All you need is some cord, jars, and citronella candles. Tie your cords around the neck of your jars and then hang them up outside. Next, put your citronella candles in the jars, light them, and prepare for an atmospheric evening outside that's free of pesky bugs.
You can use any jars you might have at home or buy some of the cheaper ones from the store. Just make sure the jars are clear so you can enjoy the light of the candles.