How can I get my hair to stay nice and straight throughout the day?

lol, My advice would be to try “Got2BGlued”

OK. before you go to bed straighten it heaps. Then when you wake up put some mouse or hairspray in it. Then divide it into sections (its easier if you have layers) and straighten SMALL bits at a time. when you have done that give it a quick spray with hair spray. any one will do. DONT LISTEN TO ALL THOSE PEOPLE SAYING YOU GOTTA HAVE REALLY EXPENSIVE STUFF IT MAKES NO DIFFERENCE. your hair should stay resonably straight. mine does the same thing as yours but now I do this and it stays straighter. :)

dont put ponytails clips nuthing in it leave it down all day and dont mess with it! or it can be you put sumthing on it like mousse or water dont put nuthing on it leave it alone

Some ideas: After washing hair blow dry it using a hot setting then cold to set the hair. Trust me blow dry is the best for half dry hair use a round paddle brush to pull the hair upwards and outwards like you see at the hairdressers. straigten with GHD they are the best or anything with a ceramic plate. And finish off with a good hairspray I think vo5 is quite good and not to expensive. Hope that helps!

Well if you go to the hairdressers, then can give you a straight wash, which keeps your hair sraighter for longer.