Where millennials will spend their money - and where they won't

Jim Cramer recently said that millennials are spending their money on three categories: Uber, cell phones, and makeup.

Still, that doesn't change the fact that retailers are obsessed with millennials. Stores are consistently trying to cater to this generally elusive demographic. And given the knowledge of where millennials would prefer to spend their hard-earned cash, retailers have to work extra hard to win them over.

However, often times when retailers try so desperately to lure this desirable (albeit generally broke) demographic, they make bizarre mistakes. Other times, they get it right.

Here's what retailers do that get millennials to spend - and what they do that makes young people recoil.