Ok, so this tip is not about fashion but if you master it you will definitely have an edge on most people.
THERE = Place. “Put that over there”
THEIR = Possession. “That’s their laptop”
THEY’RE = They are. You’re just condensing the 2 words by replacing the Y with an apostrophe. “They’re nice people”
Let me know if you have questions. It’s very simple, but for some reason many adults fails to understand simple and basic concepts. I hope this was helpful!