Just learning to do without an OVF. Not fun!
I second two things: the screen isn't the most visible of its kind in bright daylight and EX1 by default has a really strong contrast curve (dynamics), making it hard to get both the clouds and and the marble exposed correctly even though it would seem both are as bright. In many cases shadows are really challenging to capture without blowing out the highlights.
But I do find that keeping the histogram on the screen I can just tweak the exposure so that I nearly (but not quite) get a spike on the right side of the histogram. Shooting RAW enables me to dial down the exposure a bit in the post process and bring out some of the murkiest tones with a little bit of Fill Light for example.
It's not as convenient as a regular viewfinder, I give you that
Please help me with my thesis at: