|With patterns that come on large sheets of heavy paper, like those from KwikSew and HotPatterns, I generally iron the original pattern sheet flat, then trace off the pieces I need, then refold the original pattern pages and put them back in the envelope. Inevitably, I will find that I have either left out a piece, or forgotten to mark a notch or line, or traced the wrong size. Then I have to locate the correct piece among the several humongous sheets of awkward-to-mess-with paper and retrace it.
Today I had an aha moment: Before refolding the sheets, I noted what items were on the sheet, and after refolding the sheets, wrote on the outside of the folded sheets what pattern pieces were on that sheet. Now when I need to trace the gusset piece on the new HP Tuxedo shirt/tunic/dress, I can find it without unfolding all of those sheets.