Wherever you’re coming from is probably much, much lower than Cusco (11,000 feet) or Machu Picchu (just shy of 8,000 feet). Stay there for at least a day or two.
Getting from Cusco to Machu Picchu
The easiest way to get to from Cusco to Machu Picchu is to take the train to Aguas Calientes (the town located a few miles from the site)
Machu Picchu Tours
The other way to get from Cusco to Machu Picchu is to walk as part of a multi-day Machu Picchu tour. Thousands of people hike to Machu Picchu each year.