For most of my life, I’ve been a gift bag person. Coming up with gift ideas I can do but gift wrapping? Not so much. Folding perfect edges or cutting the right amount of paper has never come easy.

As Reddit user wetneon shows, you can take a length of duct tape, cut out a portion to remain sticky on each end (not unlike those paper wristbands you get at some theme parks or clubs), and fold the ...