A while ago I took a three hour photo walk around Vancouver with a trained Photographer, I had taken a number of classes offered by this photo school in the past but I learned more in the three hours than I did in a couple of all day workshops.
The biggest tip I learned and a way to remember it was this.
When using your flash in either manual or ttl mode you can adjust the appearance of the final shot by putting your camera into manual mode and adjusting the Aperture and the Shutter Speed.
Remember:
A Aperture is for Actor
S Shutter Speed is for the Scene.
Thus if your Subject – The Actor is two dark open the aperture, If he is blown out Lower the Aperture.
If your Scene is too dark Lower you shutter speed. If you want a black Background Shoot at your max sync speed.
This little tip has improved my flash photography drastically. Yes I knew the information before but remembering it when I needed it was much more difficult before I remembered.
A Aperture is for Actor
S Shutter Speed is for the Scene.
Now I should Nikon so this matches up with the settings on the camera which makes it easier to remember. Canon Shooters Sorry I have not been able to think Up something to go with TV. ( Canons designator for Shutter Speed )