Dressing for the office.

I start my new summer job in marketing on Monday and we have to dress quite smart. Being a student tends to mean jeans most days so I need to sharpen up my act! I am allowed to wear smart dresses and leggings (thank god!) but I also need a little more inspiration when it comes to skirts and trousers etc. After grilling my boss like only a fashion student can, he told me I can happily get away with colour and don't have to stick with greys. I've bought some smart/dull black trousers and have some pretty blouses to go with them but I've made some moodboards to really help me get in the office frame of mind.

What do you wear for the office? Any hints and tips?