Your mother brought you up right—you iron that crease into your trousers every time, no matter what. Too bad your mum didn't teach you how to use vinegar to iron a permanent crease into your clothes. Tip King explains:

Just pour 1/3 cup vinegar to 2/3 cup water into a spray bottle and spritz it on the area you want creased. Then cover with brown paper or something similar and iron. Voila! A perfect crease that will impress every mother for blocks around.