How to make hair soft and shiny fast?

I have a project at school tomorrow that I am very proud of. We are going to be presenting it.. Erm.. I want my hair to look good for it, especially because the person I kinda like is presenting it with me. I know, silly school crushes, but I can't help it. The only thing I could think of that might work I currently have is coconut oil. I have to shower within 2 hours, it's the night before. My hair is fairly dry and damaged, and I straighten it daily because my normal hair is hideous, and I've never once gone to school with my hair like that. 
So.. Any hair masks, things I can do to my hair, anything? I own almost the whole Garnier Fructis sleek and shine line (all but the frizz treatment and the oil mask thing, and I do have the shampoo & conditioner as well), if anything will work from that. I'm willing to do almost anything, haha. But since I am still technically a child, I can't go out and buy anything. 
So.. Any help? Diy masks? Anything at all? 
Thanks! ^^