Using off-camera flash seems like something difficult to do. It isn’t. Once you get over the mental hurdles involved, it is really quite simple. To illustrate, I have an image that I really like that I took this last fall.
This image was really simple to create. I took the couple out of the reception at sunset. Then I set camera to the setting I wanted to expose the background. When doing this, I usually underexpose the background by about 1 stop to create the deeper, richer colors. So the ambient exposure that I set was 1/250, f8 at ISO 400 on my 30D. Next, I decided I wanted the light to hit the couple from the left. Then, I set up flash, which was an Nikon SB-25 on a small lightstand fired directly at them. The flash was set to about 1/4 (might have been 1/8) to properly expose the couple to “normal” density of the skin tones. Finally, I put the groom where I wanted them and told the bride to go get him. Pretty simple! You can see more of my most recent work on my blog.