How to create a body of water below a skyline or landscape and then reflect it in the water

I love playing around with Photoshop; my favorite site is Blue Lightning TV with Marty Geller. You can now live stream Marty's tutorials online "click here for link".

I decided to try using my own image for this tutorial. It is a picture I took behind our house of the sun setting in the West--I was just curious how it would work, having a sunset reflecting on a body of water. Click on the image to see the result. Oh yeah, also wanted to see how to place a post from my blog in Facebook.