If your printer uses something called the sRGB profile (Check printer drivers), you could simulate this on your computer monitor/graphics card if it supports it.
What this does, is makes sure that the colours are exact from one source to another that supports it.
So you know after adjusting on your computer monitor, its going to be pretty accurate on the print, since your colour temperature on your monitor might be much higher than on your printer at the moment, so when editing it, your eye is viewing the colours as your wishing them to be, when in truth, there alot different.
If you go into your video card settings, check for a colour profile, and look for sRGB. Do the same with your computer monitor if it supports Colour Temperature changes.
This is what I read up about it:
"A calibrated RGB colour space, proposed as a Web standard."
So basically yeah, if you set everything up to use this standard, it should be pretty accurate to what you'll get.
I'll move it to the right place