When getting to Machu Picchu, there are several options available to you depending on how much money and time you would like to spend. The first, and possibly most traditional way is going to be hiking the Inca Trail. This is a tough hike spanning over 4 days and 3 nights but will allow you to see the sunrise over the citadel.
There is also a shorter version of the hike which starts with a train ride. If you'd prefer not to take the Inca Trail, you can take one of many other hikes, including the Lares Trek, Salkankay Trek, or the newer Chaski Trail. If you're not into hiking for any reason, there are a couple trains that vary in price and accommodations that will get you to the area.