If you have not calibrated your monitor do so for both color and luminance. If you have not, you can pretty much expect every photo to come out darker printed than what you see on screen because it is two totally different types of media and most modern day LCD screens are way too bright.
So, if you calibrate your monitor, and are able to change the luminance of your screen with the calibrating software, take the luminance down to 120 or so, mine is set to 110 for my Mac ( I print alot ), and you should be pretty close to golden.
If you do not have any software, then your pretty much stuck with only being able to change the brightness in post processing to match.
Hope this helps.