Probably the best fashion advice you can ever get is mixing budget clothes with luxury. Just because you can afford to buy a lot of designer pieces doesn't mean that you know how to put them together; or the fact that they're expensive doesn't imply that they look good. Put your money on accessories that won't go out of time, like classic bags, shoes and jewelry - mix it clothes from budget stores, and you'll still look like a million bucks.
I bought these pants from H&M for 15 bucks earlier this year, I've been wearing them a lot and they're still going strong, lol. My favorite budget store would probably be Zara, and and although I must say there quality is not the best, I still get most of my clothes from there since they always have some cute pieces.