I just got my new speedlight on Friday and I already see the benefits (I've been getting advice on another thread.) Anyway, here's the question. Since the light doesn't come on until I hit the shutter it makes the exposure meter not very useful. There is a "portrait testing" sort of mode so you can judge shadows but whats the best way to gauge exposure settings prior to making the image? Experiment and find a satisfactory histogram? Start with auto type settings and see what the camera comes up with? Hold the test button? Thanks!