Still Life With... (Food Styling and Photography) » Chaos and Colorspace:

If you produce photos for print, or display on the web you're going to come up against the problem of colour spaces at some point (if you haven't already).

The only real advice I can give is to calibrate your Gear as well as you can, if you're sending your photos off to be printed it doesn't hurt to ask which color-space is best to send them in, and to not be afraid to 'Test. Test! Test!!', on as many machines and web browsers as possible.