What is a good way to loosen up?

So, I'm 15, and I've noticed I'm becoming more and more quiet and solen (sp?). I used to be a talkitive bubbly person, I would do the most random things at random times. But, I think I'm becoming more and more like my mom. She's so uptight. She never has just real fun. Everything has to match, towels have to folded perfectly, the ornaments on the tree have to spread out evenly, basically, everything has to be perfect. I feel like I'm becoming more and more like that, instead of just finding beauty in imperfect things. What are some ways, to loosen up? I don't think I can change my mom, but I can change myself. Serious answers only please. Thanks in advance.