I have an article in the latest issue (#66) of [Giant Robot Magazine](http://giantrobot.com/) that details 12 tips for successful underwater photography. Each tip includes an example underwater image.
I haven't actually seen the layout yet, but I'm excited about it nonetheless. SCUBA diving and underwater photography need more young people getting involved. This industry is aging before our very eyes. And -- with the continued constant destruction of the planet's marine habitats, you really need to get in the water NOW to see what is still there to be seen.
Also, support Giant Robot! :)