Here is a little tip I noticed on the Canon CPN site.
If you only shoot RAW files this is a handy tip. Half the total image data is contained in the first stop on the right of the histogram. To prevent losing this information, the rule is always to expose as far to the right of the histogram as possible. EOS camera histograms and the flashing highlight warnings on the rear screen are based on jpeg data, as processed out by the camera. What this means is, if you are shooting RAW, you have more latitude in the highlights than the camera suggests. You can afford to overexpose the highlights slightly, even if the highlight warning is flashing. We're not talking stops, but 1/3 to 1/2 a stop can make the difference between a good picture and a great one. Try it and see.
Has anybody noticed a benefit or tried this tip?