I used to often wonder how people got their hair looking so good, and i genuinely believe its all down to practice. I am by no means there myself yet, but heres my current routine for wearing my hair straight.
Charles Worthington Serum - I can't find the exact one I have but this is pretty similar - link here
Mark Hill Heat Protection Spray - here
Bedhead Queen for a Day Thickening Spray - here
If you would like individual reviews of anything I've used please comment and ill get STRAIGHT to it (see what I did there ;) )