My big break was the extreme motivation/ambition that my wife had hidden inside of her that we didn't know about when we met. When we met in early college neither of us was motivated in school, she had some pretty significant depression issues and I was lonely so we spent a lot of time together. At the time she was impulsive (with money and otherwise), skipped classes and seemingly didn't care, slept a lot, ate poorly, drank heavily and smoked very heavily.
We ended up falling in love and motivating each other to get through school and find jobs. Her depression became better (through light medication and healthy lifestyle) and she quickly got through school and into a good career. 10 years later my income is probably average, but hers is very high (roughly 3x mine). She's very low maintenance and is good with a mustachian lifestyle. She even pushes for LESS spending. Those are great qualities, but I really won the lottery w/ her. She's thoughtful, smart, easy to talk to, in good shape and motivated to exercise, and attractive. Even though we were both "late bloomers" (graduating college in mid/late 20's) we're on track for a very early retirement, no debt, high incomes with stable careers, and still manage to do a LOT of travel.
In her case I think her depression was enough to keep her from moving forward. A light medication and supportive environment removed that roadblock and she became a completely different person.