LEGO Missing Pieces and how to get them

So, you’re almost done with that awesome LEGO set you bought from Yuppie Gadgets. Life is beautiful until you realize that one of the pieces is missing! You have carefully check all your packets, the box and your surroundings for the missing piece/s. It isn’t just missing, but was never included in the box. You’re going to need a replacement, and thankfully, LEGO is happy to help.

Here are the steps to follow to get that missing piece: