Yeah, you're kind of asking two separate questions. Your display needs to be calibrated with separate hardware or built-in software so that it displays colors accurately for the room that it's in, and to adjust for the particulars of your specific display. In fact, it is recommended that you recalibrate your display every week because of small changes in the display as it ages. You can use your own eyeballs to calibrate your display using the OS X calibrator located at System Preferences > Displays > Color > Calibrate... > Expert Mode. The problem with that is your eyes aren't perfect. The best way to calibrate a display is with a separate piece of hardware like the X-Rite Eye One Display or the Spyder. I prefer the Eye One (aka i1), but some people swear by the Spyder series of products. Whatever you get, make sure it can adjust the color temperature of your display via an ambient light sensor. This helps the color on your display match the color of paper that you view in the room where the computer is. If you use a separate print viewing booth, you should use the ambient light sensor on the monitor calibrator to match the display to that viewing booth.
The second issue is that you need a good profile for your printer. Again, the best way to do this is to purchase one of the high end matching systems like what X-Rite or Pantone make. It comes with the display calibrator plus a piece of hardware that measures colors on printed paper and creates an accurate profile for the printer. Most newer printers come with their own profiles, which can be pretty decent. You can select those profiles in the Print dialogues of the Application that's doing the printing. Also, you should use the profile for the final output device in the Application that you're doing the designing in. So, if you're going to use your own office printer to print out the final product, you should select that printer's ICC profile in the design program you're using (Illustrator, for instance).
A final word of warning: it's notoriously difficult to get on-screen representations of Pantone swatches to be accurate. Even after profiling everything you can think of, it's rare to get a display to REALLY show Pantone colors the same way they look in the printed Pantone swatch books. I find it easier to profile my display, design what I want, then find colors in my Pantone swatch books that match my on-screen colors. When I design using the digital Pantone swatches, it hardly ever matches the printed Pantone inks, either with the 17" Apple Studio Display or the new 24" glossy display.
Oh, and let's not get into the Glossy vs. Matte color accuracy debate.
