Matt Laur , May 04, 2011; 03:48 p.m.
Plain language: buy and use a display calibration device. That will get your display "honest," and if you're then also using the correct printer profile (associated with the paper you're choosing to use), things should line up quite well.
What are you feeling is the problem, right now? Colors off? Are the prints too dark? For a lot of people, they're close enough for a lot of results on the color, and they've simply got their display brightness up too high, which means that they're editing while looking at a picture that's being shown as much brigher than it really is (which is why the prints come out looking dark). But if you're having color issues, you need to calibrate your display. And that's a hardware/software combo deal. There are low-budget, and better mid-budget devices for that available ... and many, many threads here discussing the pros and cons (at different price points) for each.