I often get dressed in the morning by deciding I want to wear 1 particular item of clothing. Sometimes you wanna wear really bright stuff, like that plaid shirt. Lots of colors going on, its very preppy. Nothing wrong with a lot of color as long as you do a good job of balancing it out. Blue jeans make anything feel casual and the grey blazer helps tone everything down a notch.
The details of the outfit are:
Scarf from United Colors Of Benetton
Blazer by Zara
Shirt from American Eagle Apparel
Green V neck sweater from Blanco
Jeans by Cheap Monday
Shoes from a department store in Bangkok