I still learn something new almost all the time but I can't stand video tutorials.
I took this last fall and considered it a throwaway because the sky was overexposed and you couldn't even make out the clouds. I stumbled across a trick the other day that made it a whole new picture.
All I did was open the original. Then make a new transparent layer. Next I put a black to transparent gradient from top to bottom and changed the blending mode to soft light and adjusted my opacity to where I liked it.