Open up your PDF pattern, and choose the size you want to print, from the layers panel on the left side of the PFD, by hiding all of the sizes except the size you need.
Print the pages (if you do not want to print the tutorial, then select just the pages that the pattern is on). Line the pages up according to the template in your tutorial.
Trim the edges of each page (I usually just trim two edges and then overlap the pages).
Line up your pages.
Tape your pages together (if you'd like to save on tape, then just tape where the pattern pieces are).
Carefully cut out your pattern pieces.