How to do something like this?

I always try to be creative... But my mind can't think to do beautiful photoshop things...

Hey Guys, I'd like to know how to do such perfect layout such as:
http://www.rihanna-fenty.com/
http://www.sweetkisses.net

I'm not a photoshop beginner... I've been working with this software for about 2 years, but only simple things now i wanna to go "higher"

Hope you help me!

Thanks,
Vinicius