Its simple, but kind of hard to explain.
I like to wear my hair in messy buns and claw clips if its straight, i just comb any tangles out of my hair, then kind of shake my hair with my hands---then i pull it back into a loose bun or clawclip and pull some peices out by my ears (like they just fell there and i pulled them back), and i pull some small peices from the front and maybe let some hang, or gently put them back.
I hope that explanation didnt suck to much.