Love this post from Design Sponge, Sewing 101: Curtains. It is a step by step tutorial on how to make a simple set of curtains.
I've always made things myself because first of all I love to make and create things, second of all its cheap! My problem though is that I'm really terrible at following a pattern or planning out the piece I'm going to make. I more or less like to wing it. But in the long run it works out!
For example: my kitchen curtains.